merge r67228-r67235, r67237, r67251 and r67256-67259 to trunk (they are

[mono.git] / mcs / class / Managed.Windows.Forms / System.Windows.Forms / Control.cs

// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (c) 2004-2006 Novell, Inc.
//
// Authors:
//      Peter Bartok            pbartok@novell.com
//
// Partially based on work by:
//      Aleksey Ryabchuk        ryabchuk@yahoo.com
//      Alexandre Pigolkine     pigolkine@gmx.de
//      Dennis Hayes            dennish@raytek.com
//      Jaak Simm               jaaksimm@firm.ee
//      John Sohn               jsohn@columbus.rr.com
//

// COMPLETE 

#undef DebugRecreate

using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.ComponentModel.Design.Serialization;
using System.Collections;
using System.Diagnostics;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Security;
using System.Threading;

namespace System.Windows.Forms
{
        [Designer("System.Windows.Forms.Design.ControlDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
        [DefaultProperty("Text")]
        [DefaultEvent("Click")]
        [DesignerSerializer("System.Windows.Forms.Design.ControlCodeDomSerializer, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.Serialization.CodeDomSerializer, " + Consts.AssemblySystem_Design)]
        [ToolboxItemFilter("System.Windows.Forms")]
        public class Control : Component, ISynchronizeInvoke, IWin32Window
        {
                #region Local Variables

                // Basic
                internal Rectangle              bounds;                 // bounding rectangle for control (client area + decorations)
                internal object                 creator_thread;         // thread that created the control
                internal ControlNativeWindow    window;                 // object for native window handle
                internal string                 name;                   // for object naming

                // State
                internal bool                   is_created;             // true if OnCreateControl has been sent
                internal bool                   has_focus;              // true if control has focus
                internal bool                   is_visible;             // true if control is visible
                internal bool                   is_entered;             // is the mouse inside the control?
                internal bool                   is_enabled;             // true if control is enabled (usable/not grayed out)
                internal bool                   is_accessible;          // true if the control is visible to accessibility applications
                internal bool                   is_captured;            // tracks if the control has captured the mouse
                internal bool                   is_toplevel;            // tracks if the control is a toplevel window
                internal bool                   is_recreating;          // tracks if the handle for the control is being recreated
                internal bool                   causes_validation;      // tracks if validation is executed on changes
                internal int                    tab_index;              // position in tab order of siblings
                internal bool                   tab_stop = true;        // is the control a tab stop?
                internal bool                   is_disposed;            // has the window already been disposed?
                internal Size                   client_size;            // size of the client area (window excluding decorations)
                internal Rectangle              client_rect;            // rectangle with the client area (window excluding decorations)
                internal ControlStyles          control_style;          // rather win32-specific, style bits for control
                internal ImeMode                ime_mode = ImeMode.Inherit;
                internal bool                   layout_pending;         // true if our parent needs to re-layout us
                internal object                 control_tag;            // object that contains data about our control
                internal int                    mouse_clicks;           // Counter for mouse clicks
                internal Cursor                 cursor;                 // Cursor for the window
                internal bool                   allow_drop;             // true if the control accepts droping objects on it   
                internal Region                 clip_region;            // User-specified clip region for the window

                // Visuals
                internal Color                  foreground_color;       // foreground color for control
                internal Color                  background_color;       // background color for control
                internal Image                  background_image;       // background image for control
                internal Font                   font;                   // font for control
                internal string                 text;                   // window/title text for control
                internal BorderStyle            border_style;           // Border style of control

                // Layout
                internal AnchorStyles           anchor_style;           // anchoring requirements for our control
                internal DockStyle              dock_style;             // docking requirements for our control (supercedes anchoring)
                internal int                    dist_left;              // distance to the left border of the parent
                internal int                    dist_top;               // distance to the top border of the parent
                internal int                    dist_right;             // distance to the right border of the parent
                internal int                    dist_bottom;            // distance to the bottom border of the parent

                // to be categorized...
                static internal ArrayList       controls = new ArrayList();  // All of the application's controls, in a flat list
                internal ControlCollection      child_controls;         // our children
                internal Control                parent;                 // our parent control
                internal AccessibleObject       accessibility_object;   // object that contains accessibility information about our control
                internal BindingContext         binding_context;        // TODO
                internal RightToLeft            right_to_left;          // drawing direction for control
                internal int                    layout_suspended;
                internal ContextMenu            context_menu;           // Context menu associated with the control

                private Graphics                dc_mem;                 // Graphics context for double buffering
                private Bitmap                  bmp_mem;                // Bitmap for double buffering control
                private Region                  invalid_region;

                private ControlBindingsCollection data_bindings;

#if NET_2_0
                internal bool                   use_compatible_text_rendering;
                static internal bool            verify_thread_handle;
                private Padding                 padding;
                private Size                    maximum_size;
                private Size                    minimum_size;
                private Size                    preferred_size;
                private Padding                 margin;
                internal Layout.LayoutEngine    layout_engine;
#endif

                #endregion      // Local Variables

                #region Private Classes
                // This helper class allows us to dispatch messages to Control.WndProc
                internal class ControlNativeWindow : NativeWindow {
                        private Control owner;

                        public ControlNativeWindow(Control control) : base() {
                                this.owner=control;
                        }


                        public Control Owner {
                                get {
                                        return owner;
                                }
                        }

                        static internal Control ControlFromHandle(IntPtr hWnd) {
                                ControlNativeWindow     window;

                                window = (ControlNativeWindow)window_collection[hWnd];
                                if (window != null) {
                                        return window.owner;
                                }

                                return null;
                        }

                        static internal Control ControlFromChildHandle (IntPtr handle) {
                                ControlNativeWindow     window;

                                Hwnd hwnd = Hwnd.ObjectFromHandle (handle);
                                while (hwnd != null) {
                                        window = (ControlNativeWindow)window_collection[hwnd.Handle];
                                        if (window != null) {
                                                return window.owner;
                                        }
                                        hwnd = hwnd.Parent;
                                }

                                return null;
                        }

                        protected override void WndProc(ref Message m) {
                                owner.WndProc(ref m);
                        }
                }
                #endregion
                
                #region Public Classes
                [ComVisible(true)]
                public class ControlAccessibleObject : AccessibleObject {                       
                        #region ControlAccessibleObject Constructors
                        public ControlAccessibleObject(Control ownerControl) {
                                this.owner = ownerControl;
                        }
                        #endregion      // ControlAccessibleObject Constructors

                        #region ControlAccessibleObject Public Instance Properties
                        public override string DefaultAction {
                                get {
                                        return base.DefaultAction;
                                }
                        }

                        public override string Description {
                                get {
                                        return base.Description;
                                }
                        }

                        public IntPtr Handle {
                                get {
                                        return owner.Handle;
                                }

                                set {
                                        // We don't want to let them set it
                                }
                        }

                        public override string Help {
                                get {
                                        return base.Help;
                                }
                        }

                        public override string KeyboardShortcut {
                                get {
                                        return base.KeyboardShortcut;
                                }
                        }

                        public override string Name {
                                get {
                                        return base.Name;
                                }

                                set {
                                        base.Name = value;
                                }
                        }

                        public Control Owner {
                                get {
                                        return owner;
                                }
                        }

                        public override AccessibleObject Parent {
                                get {
                                        return base.Parent;
                                }
                        }


                        public override AccessibleRole Role {
                                get {
                                        return base.Role;
                                }
                        }
                        #endregion      // ControlAccessibleObject Public Instance Properties

                        #region ControlAccessibleObject Public Instance Methods
                        public override int GetHelpTopic(out string FileName) {
                                return base.GetHelpTopic (out FileName);
                        }

                        [MonoTODO("Implement this and tie it into Control.AccessibilityNotifyClients")]
                        public void NotifyClients(AccessibleEvents accEvent) {
                                throw new NotImplementedException();
                        }

                        [MonoTODO("Implement this and tie it into Control.AccessibilityNotifyClients")]
                        public void NotifyClients(AccessibleEvents accEvent, int childID) {
                                throw new NotImplementedException();
                        }

                        public override string ToString() {
                                return "ControlAccessibleObject: Owner = " + owner.ToString() + ", Text: " + owner.text;
                        }

                        #endregion      // ControlAccessibleObject Public Instance Methods
                }

                [DesignerSerializer("System.Windows.Forms.Design.ControlCollectionCodeDomSerializer, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.Serialization.CodeDomSerializer, " + Consts.AssemblySystem_Design)]
                [ListBindable(false)]
                public class ControlCollection : IList, ICollection, ICloneable, IEnumerable {
                        #region ControlCollection Local Variables
                        private ArrayList       list;
                        internal ArrayList      impl_list;
                        private Control []      all_controls;
                        internal Control        owner;
                        #endregion      // ControlCollection Local Variables

                        #region ControlCollection Public Constructor
                        public ControlCollection(Control owner) {
                                this.owner=owner;
                                this.list=new ArrayList();
                        }
                        #endregion

                        #region ControlCollection Public Instance Properties
                        public int Count {
                                get {
                                        return list.Count;
                                }
                        }

                        public bool IsReadOnly {
                                get {
                                        return list.IsReadOnly;
                                }
                        }

                        public virtual Control this[int index] {
                                get {
                                        if (index < 0 || index >= list.Count) {
                                                throw new ArgumentOutOfRangeException("index", index, "ControlCollection does not have that many controls");
                                        }
                                        return (Control)list[index];
                                }
                        }
                        #endregion // ControlCollection Public Instance Properties
                        
                        #region ControlCollection Private Instance Methods
                        public virtual void Add (Control value)
                        {
                                if (value == null)
                                        return;
                                
                                if (Contains (value)) {
                                        owner.PerformLayout();
                                        return;
                                }

                                if (value.tab_index == -1) {
                                        int     end;
                                        int     index;
                                        int     use;

                                        use = 0;
                                        end = owner.child_controls.Count;
                                        for (int i = 0; i < end; i++) {
                                                index = owner.child_controls[i].tab_index;
                                                if (index >= use) {
                                                        use = index + 1;
                                                }
                                        }
                                        value.tab_index = use;
                                }

                                if (value.parent != null) {
                                        value.parent.Controls.Remove(value);
                                }

                                all_controls = null;
                                list.Add (value);

                                value.ChangeParent(owner);

                                value.InitLayout();

                                owner.UpdateChildrenZOrder();
                                owner.PerformLayout(value, "Parent");
                                owner.OnControlAdded(new ControlEventArgs(value));
                        }
                        
                        internal void AddToList (Control c)
                        {
                                all_controls = null;
                                list.Add (c);
                        }

                        internal virtual void AddImplicit (Control control)
                        {
                                if (impl_list == null)
                                        impl_list = new ArrayList ();

                                if (AllContains (control))
                                        return;

                                all_controls = null;
                                impl_list.Add (control);

                                control.ChangeParent (owner);
                                control.InitLayout ();
                                owner.UpdateChildrenZOrder ();
                                owner.PerformLayout (control, "Parent");
                                owner.OnControlAdded (new ControlEventArgs (control));
                        }

                        public virtual void AddRange (Control[] controls)
                        {
                                if (controls == null)
                                        throw new ArgumentNullException ("controls");

                                owner.SuspendLayout ();

                                try {
                                        for (int i = 0; i < controls.Length; i++) 
                                                Add (controls[i]);
                                } finally {
                                        owner.ResumeLayout ();
                                }
                        }

                        internal virtual void AddRangeImplicit (Control [] controls)
                        {
                                if (controls == null)
                                        throw new ArgumentNullException ("controls");

                                owner.SuspendLayout ();

                                try {
                                        for (int i = 0; i < controls.Length; i++)
                                                AddImplicit (controls [i]);
                                } finally {
                                        owner.ResumeLayout ();
                                }
                        }

                        public virtual void Clear ()
                        {
                                all_controls = null;

                                // MS sends remove events in reverse order
                                while (list.Count > 0) {
                                        Remove((Control)list[list.Count - 1]);
                                }
                        }

                        internal virtual void ClearImplicit ()
                        {
                                if (impl_list == null)
                                        return;
                                all_controls = null;
                                impl_list.Clear ();
                        }

                        public bool Contains (Control value)
                        {
                                for (int i = list.Count; i > 0; ) {
                                        i--;
                                        
                                        if (list [i] == value) {
                                                // Do we need to do anything here?
                                                return true;
                                        }
                                }
                                return false;
                        }

                        internal bool ImplicitContains (Control value)
                        {
                                if (impl_list == null)
                                        return false;

                                for (int i = impl_list.Count; i > 0; ) {
                                        i--;
                                        
                                        if (impl_list [i] == value) {
                                                // Do we need to do anything here?
                                                return true;
                                        }
                                }
                                return false;
                        }

                        internal bool AllContains (Control value)
                        {
                                return Contains (value) || ImplicitContains (value);
                        }

                        public void CopyTo (Array array, int index)
                        {
                                list.CopyTo(array, index);
                        }

                        public override bool Equals(object other) {
                                if (other is ControlCollection && (((ControlCollection)other).owner==this.owner)) {
                                        return(true);
                                } else {
                                        return(false);
                                }
                        }

                        public int GetChildIndex(Control child) {
                                return GetChildIndex(child, false);
                        }

                        public int GetChildIndex(Control child, bool throwException) {
                                int index;

                                index=list.IndexOf(child);

                                if (index==-1 && throwException) {
                                        throw new ArgumentException("Not a child control", "child");
                                }
                                return index;
                        }

                        public IEnumerator GetEnumerator() {
                                return list.GetEnumerator();
                        }

                        internal IEnumerator GetAllEnumerator ()
                        {
                                Control [] res = GetAllControls ();
                                return res.GetEnumerator ();
                        }

                        internal Control [] GetAllControls ()
                        {
                                if (all_controls != null)
                                        return all_controls;

                                if (impl_list == null) {
                                        all_controls = (Control []) list.ToArray (typeof (Control));
                                        return all_controls;
                                }
                                
                                all_controls = new Control [list.Count + impl_list.Count];
                                impl_list.CopyTo (all_controls);
                                list.CopyTo (all_controls, impl_list.Count);

                                return all_controls;
                        }

                        public override int GetHashCode() {
                                return base.GetHashCode();
                        }

                        public int IndexOf(Control control) {
                                return list.IndexOf(control);
                        }

                        public virtual void Remove(Control value) {
                                owner.PerformLayout(value, "Parent");
                                owner.OnControlRemoved(new ControlEventArgs(value));

                                all_controls = null;
                                list.Remove(value);

                                value.ChangeParent(null);

                                owner.UpdateChildrenZOrder();
                        }

                        internal virtual void RemoveImplicit (Control control)
                        {
                                if (impl_list != null) {
                                        all_controls = null;
                                        owner.PerformLayout (control, "Parent");
                                        owner.OnControlRemoved (new ControlEventArgs (control));
                                        impl_list.Remove (control);
                                }
                                control.ChangeParent (null);
                                owner.UpdateChildrenZOrder ();
                        }

                        public void RemoveAt(int index) {
                                if (index < 0 || index >= list.Count) {
                                        throw new ArgumentOutOfRangeException("index", index, "ControlCollection does not have that many controls");
                                }
                                Remove ((Control)list[index]);
                        }

                        public void SetChildIndex(Control child, int newIndex) {
                                int     old_index;

                                old_index=list.IndexOf(child);
                                if (old_index==-1) {
                                        throw new ArgumentException("Not a child control", "child");
                                }

                                if (old_index==newIndex) {
                                        return;
                                }

                                all_controls = null;
                                list.RemoveAt(old_index);

                                if (newIndex>list.Count) {
                                        list.Add(child);
                                } else {
                                        list.Insert(newIndex, child);
                                }
                                child.UpdateZOrder();
                                owner.PerformLayout();
                        }
                        #endregion // ControlCollection Private Instance Methods

                        #region ControlCollection Interface Properties
                        object IList.this[int index] {
                                get {
                                        if (index<0 || index>=list.Count) {
                                                throw new ArgumentOutOfRangeException("index", index, "ControlCollection does not have that many controls");
                                        }
                                        return this[index];
                                }

                                set {
                                        if (!(value is Control)) {
                                                throw new ArgumentException("Object of type Control required", "value");
                                        }

                                        all_controls = null;
                                        Control ctrl = (Control) value;
                                        list[index]= ctrl;

                                        ctrl.ChangeParent(owner);

                                        ctrl.InitLayout();

                                        owner.UpdateChildrenZOrder();
                                        owner.PerformLayout(ctrl, "Parent");
                                }
                        }

                        bool IList.IsFixedSize {
                                get {
                                        return false;
                                }
                        }

                        bool ICollection.IsSynchronized {
                                get {
                                        return list.IsSynchronized;
                                }
                        }

                        object ICollection.SyncRoot {
                                get {
                                        return list.SyncRoot;
                                }
                        }
                        #endregion // ControlCollection Interface Properties

                        #region ControlCollection Interface Methods
                        int IList.Add(object value) {
                                if (value == null) {
                                        throw new ArgumentNullException("value", "Cannot add null controls");
                                }

                                if (!(value is Control)) {
                                        throw new ArgumentException("Object of type Control required", "value");
                                }

                                return list.Add(value);
                        }

                        bool IList.Contains(object value) {
                                if (!(value is Control)) {
                                        throw new ArgumentException("Object of type Control required", "value");
                                }

                                return this.Contains((Control) value);
                        }

                        int IList.IndexOf(object value) {
                                if (!(value is Control)) {
                                        throw new ArgumentException("Object of type Control  required", "value");
                                }

                                return this.IndexOf((Control) value);
                        }

                        void IList.Insert(int index, object value) {
                                if (!(value is Control)) {
                                        throw new ArgumentException("Object of type Control required", "value");
                                }
                                all_controls = null;
                                list.Insert(index, value);
                        }

                        void IList.Remove(object value) {
                                if (!(value is Control)) {
                                        throw new ArgumentException("Object of type Control required", "value");
                                }
                                all_controls = null;
                                list.Remove(value);
                        }

                        Object ICloneable.Clone() {
                                ControlCollection clone = new ControlCollection(this.owner);
                                clone.list=(ArrayList)list.Clone();             // FIXME: Do we need this?
                                return clone;
                        }
                        #endregion // ControlCollection Interface Methods
                }
                #endregion      // ControlCollection Class
                
                #region Public Constructors
                public Control() {                      

                        anchor_style = AnchorStyles.Top | AnchorStyles.Left;

                        is_created = false;
                        is_visible = true;
                        is_captured = false;
                        is_disposed = false;
                        is_enabled = true;
                        is_entered = false;
                        layout_pending = false;
                        is_toplevel = false;
                        causes_validation = true;
                        has_focus = false;
                        layout_suspended = 0;           
                        mouse_clicks = 1;
                        tab_index = -1;
                        cursor = null;
                        right_to_left = RightToLeft.Inherit;
                        border_style = BorderStyle.None;
                        background_color = Color.Empty;
                        dist_left = 0;
                        dist_right = 0;
                        dist_top = 0;
                        dist_bottom = 0;

#if NET_2_0
                        use_compatible_text_rendering = Application.use_compatible_text_rendering;
                        padding = new Padding(0);
                        maximum_size = new Size();
                        minimum_size = new Size();
                        preferred_size = new Size();
                        margin = this.DefaultMargin;
                        layout_engine = new Layout.DefaultLayout();
#endif

                        control_style = ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint | 
                                        ControlStyles.Selectable | ControlStyles.StandardClick | 
                                        ControlStyles.StandardDoubleClick;

                        parent = null;
                        background_image = null;
                        text = string.Empty;
                        name = string.Empty;                    

                        window = new ControlNativeWindow(this);
                        child_controls = CreateControlsInstance();
                        client_size = new Size(DefaultSize.Width, DefaultSize.Height);
                        client_rect = new Rectangle(0, 0, DefaultSize.Width, DefaultSize.Height);
                        XplatUI.CalculateWindowRect(ref client_rect, CreateParams.Style, CreateParams.ExStyle, null, out bounds);
                        if ((CreateParams.Style & (int)WindowStyles.WS_CHILD) == 0) {
                                bounds.X=-1;
                                bounds.Y=-1;
                        }
                }

                public Control(Control parent, string text) : this() {
                        Text=text;
                        Parent=parent;
                }

                public Control(Control parent, string text, int left, int top, int width, int height) : this() {
                        Parent=parent;
                        bounds.X=left;
                        bounds.Y=top;
                        bounds.Width=width;
                        bounds.Height=height;
                        SetBounds(left, top, width, height, BoundsSpecified.All);
                        Text=text;
                }

                public Control(string text) : this() {
                        Text=text;
                }

                public Control(string text, int left, int top, int width, int height) : this() {
                        bounds.X=left;
                        bounds.Y=top;
                        bounds.Width=width;
                        bounds.Height=height;
                        SetBounds(left, top, width, height, BoundsSpecified.All);
                        Text=text;
                }

                private delegate void RemoveDelegate(object c);

                protected override void Dispose(bool disposing) {
                        if (!is_disposed && disposing) {
                                Capture = false;

                                if (dc_mem!=null) {
                                        dc_mem.Dispose();
                                        dc_mem=null;
                                }

                                if (bmp_mem!=null) {
                                        bmp_mem.Dispose();
                                        bmp_mem=null;
                                }

                                if (invalid_region!=null) {
                                        invalid_region.Dispose();
                                        invalid_region=null;
                                }
                                if (this.InvokeRequired) {
                                        if (Application.MessageLoop) {
                                                this.BeginInvokeInternal(new MethodInvoker(DestroyHandle), null, true);
                                                this.BeginInvokeInternal(new RemoveDelegate(controls.Remove), new object[] {this}, true);
                                        }
                                } else {
                                        DestroyHandle();
                                        lock (Control.controls) {
                                                Control.controls.Remove(this);
                                        }
                                }


                                if (parent != null) {
                                        parent.Controls.Remove(this);
                                }

                                Control [] children = child_controls.GetAllControls ();
                                for (int i=0; i<children.Length; i++) {
                                        children[i].parent = null;      // Need to set to null or our child will try and remove from ourselves and crash
                                        children[i].Dispose();
                                }
                        }
                        is_disposed = true;
                        is_visible = false;
                        base.Dispose(disposing);
                }
                #endregion      // Public Constructors

                #region Internal Properties
                internal BorderStyle InternalBorderStyle {
                        get {
                                return border_style;
                        }

                        set {
                                if (!Enum.IsDefined (typeof (BorderStyle), value))
                                        throw new InvalidEnumArgumentException (string.Format("Enum argument value '{0}' is not valid for BorderStyle", value));

                                if (border_style != value) {
                                        border_style = value;

                                        if (IsHandleCreated) {
                                                XplatUI.SetBorderStyle(window.Handle, (FormBorderStyle)border_style);
                                                Refresh();
                                        }
                                }
                        }
                }
                #endregion      // Internal Properties

                #region Private & Internal Methods
                internal IAsyncResult BeginInvokeInternal (Delegate method, object [] args, bool disposing) {
                        AsyncMethodResult       result;
                        AsyncMethodData         data;

                        if (!disposing) {
                                Control                 p;

                                p = this;
                                do {
                                        if (!p.IsHandleCreated) {
                                                throw new InvalidOperationException("Cannot call Invoke or InvokeAsync on a control until the window handle is created");
                                        }
                                        p = p.parent;
                                } while (p != null);
                        }

                        result = new AsyncMethodResult ();
                        data = new AsyncMethodData ();

                        data.Handle = window.Handle;
                        data.Method = method;
                        data.Args = args;
                        data.Result = result;

#if NET_2_0
                        if (!ExecutionContext.IsFlowSuppressed ()) {
                                data.Context = ExecutionContext.Capture ();
                        }
#else
#if !MWF_ON_MSRUNTIME
                        if (SecurityManager.SecurityEnabled) {
                                data.Stack = CompressedStack.GetCompressedStack ();
                        }
#endif
#endif

                        XplatUI.SendAsyncMethod (data);
                        return result;
                }

                
                internal void PointToClient (ref int x, ref int y)
                {
                        XplatUI.ScreenToClient (Handle, ref x, ref y);
                }

                internal void PointToScreen (ref int x, ref int y)
                {
                        XplatUI.ClientToScreen (Handle, ref x, ref y);
                }

                internal bool IsRecreating {
                        get {
                                return is_recreating;
                        }
                }

                internal Graphics DeviceContext {
                        get { 
                                if (dc_mem == null) {
                                        CreateBuffers(this.Width, this.Height);
                                }
                                return dc_mem;
                        }
                }

                private void ImageBufferNeedsRedraw () {
                        if (invalid_region != null)
                                invalid_region.Dispose();
                        invalid_region = new Region (ClientRectangle);
                }

                private Bitmap ImageBuffer {
                        get {
                                if (bmp_mem==null) {
                                        CreateBuffers(this.Width, this.Height);
                                }
                                return bmp_mem;
                        }
                }

                internal void CreateBuffers (int width, int height) {
                        if (width < 1) {
                                width = 1;
                        }

                        if (height < 1) {
                                height = 1;
                        }

                        bmp_mem = new Bitmap (width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
                        dc_mem = Graphics.FromImage (bmp_mem);
                        ImageBufferNeedsRedraw ();
                }

                internal void InvalidateBuffers ()
                {
                        if (dc_mem != null) {
                                dc_mem.Dispose ();
                        }

                        dc_mem = null;
                        bmp_mem = null;
                        ImageBufferNeedsRedraw ();
                }

                internal static void SetChildColor(Control parent) {
                        Control child;

                        for (int i=0; i < parent.child_controls.Count; i++) {
                                child=parent.child_controls[i];
                                if (child.child_controls.Count>0) {
                                        SetChildColor(child);
                                }
                        }
                                
                }

                internal bool Select(Control control) {
                        IContainerControl       container;

                        if (control == null) {
                                return false;
                        }

                        container = GetContainerControl();
                        if (container != null) {
                                container.ActiveControl = control;
                        }
                        if (control.IsHandleCreated) {
                                XplatUI.SetFocus(control.window.Handle);
                        }
                        return true;
                }

                internal void SelectChild (Control control)
                {
                        if (control.IsHandleCreated)
                                XplatUI.SetFocus (control.window.Handle);
                }

                internal virtual void DoDefaultAction() {
                        // Only here to be overriden by our actual controls; this is needed by the accessibility class
                }

                internal static int LowOrder (int param) {
                        return ((int)(short)(param & 0xffff));
                }

                internal static int HighOrder (int param) {
                        return ((int)(short)(param >> 16));
                }

                // This method exists so controls overriding OnPaintBackground can have default background painting done
                internal virtual void PaintControlBackground (PaintEventArgs pevent)
                {
                        if (GetStyle(ControlStyles.SupportsTransparentBackColor) && (BackColor.A != 0xff)) {
                                if (parent != null) {
                                        PaintEventArgs  parent_pe;
                                        GraphicsState   state;

                                        parent_pe = new PaintEventArgs(pevent.Graphics, new Rectangle(pevent.ClipRectangle.X + Left, pevent.ClipRectangle.Y + Top, pevent.ClipRectangle.Width, pevent.ClipRectangle.Height));

                                        state = parent_pe.Graphics.Save();
                                        parent_pe.Graphics.TranslateTransform(-Left, -Top);
                                        parent.OnPaintBackground(parent_pe);
                                        parent_pe.Graphics.Restore(state);

                                        state = parent_pe.Graphics.Save();
                                        parent_pe.Graphics.TranslateTransform(-Left, -Top);
                                        parent.OnPaint(parent_pe);
                                        parent_pe.Graphics.Restore(state);
                                        parent_pe.SetGraphics(null);
                                }
                        }

                        if ((clip_region != null) && (XplatUI.UserClipWontExposeParent)) {
                                if (parent != null) {
                                        PaintEventArgs  parent_pe;
                                        Region          region;
                                        GraphicsState   state;
                                        Hwnd            hwnd;

                                        hwnd = Hwnd.ObjectFromHandle(Handle);

                                        if (hwnd != null) {
                                                parent_pe = new PaintEventArgs(pevent.Graphics, new Rectangle(pevent.ClipRectangle.X + Left, pevent.ClipRectangle.Y + Top, pevent.ClipRectangle.Width, pevent.ClipRectangle.Height));

                                                region = new Region ();
                                                region.MakeEmpty();
                                                region.Union(ClientRectangle);

                                                foreach (Rectangle r in hwnd.ClipRectangles) {
                                                        region.Union (r);
                                                }

                                                state = parent_pe.Graphics.Save();
                                                parent_pe.Graphics.Clip = region;

                                                parent_pe.Graphics.TranslateTransform(-Left, -Top);
                                                parent.OnPaintBackground(parent_pe);
                                                parent_pe.Graphics.Restore(state);

                                                state = parent_pe.Graphics.Save();
                                                parent_pe.Graphics.Clip = region;

                                                parent_pe.Graphics.TranslateTransform(-Left, -Top);
                                                parent.OnPaint(parent_pe);
                                                parent_pe.Graphics.Restore(state);
                                                parent_pe.SetGraphics(null);

                                                region.Intersect(clip_region);
                                                pevent.Graphics.Clip = region;
                                        }
                                }
                        }

                        if (background_image == null) {
                                pevent.Graphics.FillRectangle(ThemeEngine.Current.ResPool.GetSolidBrush(BackColor), new Rectangle(pevent.ClipRectangle.X - 1, pevent.ClipRectangle.Y - 1, pevent.ClipRectangle.Width + 2, pevent.ClipRectangle.Height + 2));
                                return;
                        }

                        DrawBackgroundImage (pevent.Graphics);
                }

                void DrawBackgroundImage (Graphics g)
                {
                        using (TextureBrush b = new TextureBrush (background_image, WrapMode.Tile)) {
                                g.FillRectangle (b, ClientRectangle);
                        }
                }

                internal virtual void DndEnter (DragEventArgs e)
                {
                        try {
                                OnDragEnter (e);
                        } catch { }
                }

                internal virtual void DndOver (DragEventArgs e)
                {
                        try {
                                OnDragOver (e);
                        } catch { }
                }

                internal virtual void DndDrop (DragEventArgs e)
                {
                        try {
                                OnDragDrop (e);
                        } catch (Exception exc) {
                                Console.Error.WriteLine ("MWF: Exception while dropping:");
                                Console.Error.WriteLine (exc);
                        }
                }

                internal virtual void DndLeave (EventArgs e)
                {
                        try {
                                OnDragLeave (e);
                        } catch { }
                }

                internal virtual void DndFeedback(GiveFeedbackEventArgs e)
                {
                        try {
                                OnGiveFeedback(e);
                        } catch { }
                }

                internal virtual void DndContinueDrag(QueryContinueDragEventArgs e)
                {
                        try {
                                OnQueryContinueDrag(e);
                        } catch { }
                }
                
                internal static MouseButtons FromParamToMouseButtons (int param) {              
                        MouseButtons buttons = MouseButtons.None;
                                        
                        if ((param & (int) MsgButtons.MK_LBUTTON) != 0)
                                buttons |= MouseButtons.Left;
                        
                        if ((param & (int) MsgButtons.MK_MBUTTON) != 0)
                                buttons |= MouseButtons.Middle;
                                
                        if ((param & (int) MsgButtons.MK_RBUTTON) != 0)
                                buttons |= MouseButtons.Right;          
                                
                        return buttons;

                }

                internal void FireEnter ()
                {
                        OnEnter (EventArgs.Empty);
                }

                internal void FireLeave ()
                {
                        OnLeave (EventArgs.Empty);
                }

                internal void FireValidating (CancelEventArgs ce)
                {
                        OnValidating (ce);
                }

                internal void FireValidated ()
                {
                        OnValidated (EventArgs.Empty);
                }

                internal virtual bool ProcessControlMnemonic(char charCode) {
                        return ProcessMnemonic(charCode);
                }

                private static Control FindFlatForward(Control container, Control start) {
                        Control found;
                        int     index;
                        int     end;

                        found = null;
                        end = container.child_controls.Count;

                        if (start != null) {
                                index = start.tab_index;
                        } else {
                                index = -1;
                        }


                        for (int i = 0, pos = -1; i < end; i++) {
                                if (start == container.child_controls[i]) {
                                        pos = i;
                                        continue;
                                }

                                if (found == null) {
                                        if (container.child_controls[i].tab_index > index || (pos > -1 && pos < i && container.child_controls[i].tab_index == index)) {
                                                found = container.child_controls[i];
                                        }
                                } else if (found.tab_index > container.child_controls[i].tab_index) {
                                        if (container.child_controls[i].tab_index > index) {
                                                found = container.child_controls[i];
                                        }
                                }
                        }
                        return found;
                }

                private static Control FindControlForward(Control container, Control start) {
                        Control found;
                        Control p;

                        found = null;

                        if (start != null) {
                                if (start.child_controls != null && start.child_controls.Count > 0 &&
                                        !((start is IContainerControl) && start.GetStyle(ControlStyles.ContainerControl))) {
                                        found = FindControlForward(start, null);
                                        if (found != null) {
                                                return found;
                                        }
                                }

                                p = start.parent;
                                while (p != container) {
                                        found = FindFlatForward(p, start);
                                        if (found != null) {
                                                return found;
                                        }
                                        start = p;
                                        p = p.parent;
                                }
                        }
                        return FindFlatForward(container, start);
                }

                private static Control FindFlatBackward(Control container, Control start) {
                        Control found;
                        int     index;
                        int     end;

                        found = null;
                        end = container.child_controls.Count;

                        if (start != null) {
                                index = start.tab_index;
                        } else {
                                // FIXME: Possible speed-up: Keep the highest taborder index in the container
                                index = -1;
                                for (int i = 0; i < end; i++) {
                                        if (container.child_controls[i].tab_index > index) {
                                                index = container.child_controls[i].tab_index;
                                        }
                                }
                                index++;
                        }

                        for (int i = end-1, pos = -1; i >= 0; i--) {
                                if (start == container.child_controls[i]) {
                                        pos = i;
                                        continue;
                                }

                                if (found == null) {
                                        if (container.child_controls[i].tab_index < index || 
                                                (pos > -1 && pos > i && container.child_controls[i].tab_index == index)) {
                                                found = container.child_controls[i];
                                        }
                                } else if (found.tab_index < container.child_controls[i].tab_index) {
                                        if (container.child_controls[i].tab_index < index) {
                                                found = container.child_controls[i];
                                        }
                                }
                        }
                        return found;
                }

                private static Control FindControlBackward(Control container, Control start) {
                        Control found;

                        found = null;

                        if (start != null) {
                                found = FindFlatBackward(start.parent, start);
                                if (found == null) {
                                        if (start.parent != container) {
                                                return start.parent;
                                        }
                                }
                        }
                        if (found == null) {
                                found = FindFlatBackward(container, start);
                        }

                        if (container != start) {
                                while ((found != null) && (!found.Contains(start)) && found.child_controls != null && found.child_controls.Count > 0 && !(found is IContainerControl)) {// || found.GetStyle(ControlStyles.ContainerControl))) {
                                        found = FindControlBackward(found, null);
                                         if (found != null) {
                                                return found;
                                        }
                                }
                        }

                        return found;
                }

                internal virtual void HandleClick(int clicks, MouseEventArgs me) {
                        if (GetStyle(ControlStyles.StandardClick)) {
                                if ((clicks > 1) && GetStyle(ControlStyles.StandardDoubleClick)) {
#if !NET_2_0
                                        OnDoubleClick(EventArgs.Empty);
                                } else {
                                        OnClick(EventArgs.Empty);
#else
                                        OnDoubleClick(me);
                                } else {
                                        OnClick(me);
#endif
                                }
                        }
                }

                private void CheckDataBindings ()
                {
                        if (data_bindings == null)
                                return;

                        BindingContext binding_context = BindingContext;
                        foreach (Binding binding in data_bindings) {
                                binding.Check (binding_context);
                        }
                }


                private void ChangeParent(Control new_parent) {
                        bool            pre_enabled;
                        bool            pre_visible;
                        Font            pre_font;
                        Color           pre_fore_color;
                        Color           pre_back_color;
                        RightToLeft     pre_rtl;

                        // These properties are inherited from our parent
                        // Get them pre parent-change and then send events
                        // if they are changed after we have our new parent
                        pre_enabled = Enabled;
                        pre_visible = Visible;
                        pre_font = Font;
                        pre_fore_color = ForeColor;
                        pre_back_color = BackColor;
                        pre_rtl = RightToLeft;
                        // MS doesn't seem to send a CursorChangedEvent

                        parent = new_parent;

                        if (IsHandleCreated)
                                XplatUI.SetParent(Handle,
                                                  (new_parent == null || !new_parent.IsHandleCreated) ? IntPtr.Zero : new_parent.Handle);

                        OnParentChanged(EventArgs.Empty);

                        if (pre_enabled != Enabled) {
                                OnEnabledChanged(EventArgs.Empty);
                        }

                        if (pre_visible != Visible) {
                                OnVisibleChanged(EventArgs.Empty);
                        }

                        if (pre_font != Font) {
                                OnFontChanged(EventArgs.Empty);
                        }

                        if (pre_fore_color != ForeColor) {
                                OnForeColorChanged(EventArgs.Empty);
                        }

                        if (pre_back_color != BackColor) {
                                OnBackColorChanged(EventArgs.Empty);
                        }

                        if (pre_rtl != RightToLeft) {
                                // MS sneaks a OnCreateControl and OnHandleCreated in here, I guess
                                // because when RTL changes they have to recreate the win32 control
                                // We don't really need that (until someone runs into compatibility issues)
                                OnRightToLeftChanged(EventArgs.Empty);
                        }

                        if ((new_parent != null) && new_parent.Created && !Created) {
                                CreateControl();
                        }

                        if ((binding_context == null) && Created) {
                                OnBindingContextChanged(EventArgs.Empty);
                        }
                }

                private void UpdateDistances() {
                        if ((parent != null) && (parent.layout_suspended == 0)) {
                                dist_left = bounds.X;
                                dist_top = bounds.Y;
                                dist_right = parent.ClientSize.Width - bounds.X - bounds.Width;
                                dist_bottom = parent.ClientSize.Height - bounds.Y - bounds.Height;
                        }
                }
                #endregion      // Private & Internal Methods

                #region Public Static Properties
                public static Color DefaultBackColor {
                        get {
                                return ThemeEngine.Current.DefaultControlBackColor;
                        }
                }

                public static Font DefaultFont {
                        get {
                                return ThemeEngine.Current.DefaultFont;
                        }
                }

                public static Color DefaultForeColor {
                        get {
                                return ThemeEngine.Current.DefaultControlForeColor;
                        }
                }

                public static Keys ModifierKeys {
                        get {
                                return XplatUI.State.ModifierKeys;
                        }
                }

                public static MouseButtons MouseButtons {
                        get {
                                return XplatUI.State.MouseButtons;
                        }
                }

                public static Point MousePosition {
                        get {
                                return Cursor.Position;
                        }
                }
                
#if NET_2_0
                [MonoTODO]
                public static bool CheckForIllegalCrossThreadCalls 
                {
                        get {
                                return verify_thread_handle;
                        }

                        set {
                                verify_thread_handle = value;
                        }
                }
#endif
                #endregion      // Public Static Properties

                #region Public Instance Properties
                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public AccessibleObject AccessibilityObject {
                        get {
                                if (accessibility_object==null) {
                                        accessibility_object=CreateAccessibilityInstance();
                                }
                                return accessibility_object;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public string AccessibleDefaultActionDescription {
                        get {
                                return AccessibilityObject.default_action;
                        }

                        set {
                                AccessibilityObject.default_action=value;
                        }
                }

                [Localizable(true)]
                [DefaultValue(null)]
                [MWFCategory("Accessibility")]
                public string AccessibleDescription {
                        get {
                                return AccessibilityObject.description;
                        }

                        set {
                                AccessibilityObject.description=value;
                        }
                }

                [Localizable(true)]
                [DefaultValue(null)]
                [MWFCategory("Accessibility")]
                public string AccessibleName {
                        get {
                                return AccessibilityObject.Name;
                        }

                        set {
                                AccessibilityObject.Name=value;
                        }
                }

                [DefaultValue(AccessibleRole.Default)]
                [MWFDescription("Role of the control"), MWFCategory("Accessibility")]
                public AccessibleRole AccessibleRole {
                        get {
                                return AccessibilityObject.role;
                        }

                        set {
                                AccessibilityObject.role=value;
                        }
                }

                [DefaultValue(false)]
                [MWFCategory("Behavior")]
                public virtual bool AllowDrop {
                        get {
                                return allow_drop;
                        }

                        set {
                                if (allow_drop == value)
                                        return;
                                allow_drop = value;
                                if (IsHandleCreated) {
                                        UpdateStyles();
                                        XplatUI.SetAllowDrop (Handle, value);
                                }
                        }
                }

                [Localizable(true)]
                [RefreshProperties(RefreshProperties.Repaint)]
                [DefaultValue(AnchorStyles.Top | AnchorStyles.Left)]
                [MWFCategory("Layout")]
                public virtual AnchorStyles Anchor {
                        get {
                                return anchor_style;
                        }

                        set {
                                anchor_style=value;

                                if (parent != null) {
                                        parent.PerformLayout(this, "Parent");
                                }
                        }
                }

#if NET_2_0
                // XXX: Implement me!
                bool auto_size;

                public virtual bool AutoSize {
                        get {
                                //Console.Error.WriteLine("Unimplemented: Control::get_AutoSize()");
                                return auto_size;
                        }
                        set {
                                Console.Error.WriteLine("Unimplemented: Control::set_AutoSize(bool)");
                                auto_size = value;
                        }
                }

                public virtual Size MaximumSize {
                        get {
                                return maximum_size;
                        }
                        set {
                                maximum_size = value;
                        }
                }

                public virtual Size MinimumSize {
                        get {
                                return minimum_size;
                        }
                        set {
                                minimum_size = value;
                        }
                }
#endif // NET_2_0

                [DispId(-501)]
                [MWFCategory("Appearance")]
                public virtual Color BackColor {
                        get {
                                if (background_color.IsEmpty) {
                                        if (parent!=null) {
                                                Color pcolor = parent.BackColor;
                                                if (pcolor.A == 0xff || GetStyle(ControlStyles.SupportsTransparentBackColor))
                                                        return pcolor;
                                        }
                                        return DefaultBackColor;
                                }
                                return background_color;
                        }

                        set {
                                if (!value.IsEmpty && (value.A != 0xff) && !GetStyle(ControlStyles.SupportsTransparentBackColor)) {
                                        throw new ArgumentException("Transparent background colors are not supported on this control");
                                }

                                if (background_color != value) {
                                        background_color=value;
                                        SetChildColor(this);
                                        OnBackColorChanged(EventArgs.Empty);
                                        Invalidate();
                                }
                        }
                }

                [Localizable(true)]
                [DefaultValue(null)]
                [MWFCategory("Appearance")]
                public virtual Image BackgroundImage {
                        get {
                                return background_image;
                        }

                        set {
                                if (background_image!=value) {
                                        background_image=value;
                                        OnBackgroundImageChanged(EventArgs.Empty);
                                }
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public virtual BindingContext BindingContext {
                        get {
                                if (binding_context != null)
                                        return binding_context;
                                if (Parent == null)
                                        return null;
                                binding_context = Parent.BindingContext;
                                return binding_context;
                        }
                        set {
                                if (binding_context != value) {
                                        binding_context = value;
                                        OnBindingContextChanged(EventArgs.Empty);
                                }
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public int Bottom {
                        get {
                                return bounds.Y+bounds.Height;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public Rectangle Bounds {
                        get {
                                return this.bounds;
                        }

                        set {
                                SetBounds(value.Left, value.Top, value.Width, value.Height, BoundsSpecified.All);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public bool CanFocus {
                        get {
                                if (IsHandleCreated && Visible && Enabled) {
                                        return true;
                                }
                                return false;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public bool CanSelect {
                        get {
                                Control parent;

                                if (!GetStyle(ControlStyles.Selectable)) {
                                        return false;
                                }

                                parent = this;
                                while (parent != null) {
                                        if (!parent.is_visible || !parent.is_enabled) {
                                                return false;
                                        }

                                        parent = parent.parent;
                                }
                                return true;
                        }
                }

                internal virtual bool InternalCapture {
                        get {
                                return Capture;
                        }

                        set {
                                Capture = value;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public bool Capture {
                        get {
                                return this.is_captured;
                        }

                        set {
                                if (this.IsHandleCreated && value != is_captured) {
                                        if (value) {
                                                is_captured = true;
                                                XplatUI.GrabWindow(this.window.Handle, IntPtr.Zero);
                                        } else {
                                                XplatUI.UngrabWindow(this.window.Handle);
                                                is_captured = false;
                                        }
                                }
                        }
                }

                [DefaultValue(true)]
                [MWFCategory("Focus")]
                public bool CausesValidation {
                        get {
                                return this.causes_validation;
                        }

                        set {
                                if (this.causes_validation != value) {
                                        causes_validation = value;
                                        OnCausesValidationChanged(EventArgs.Empty);
                                }
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public Rectangle ClientRectangle {
                        get {
                                client_rect.Width = client_size.Width;
                                client_rect.Height = client_size.Height;
                                return client_rect;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public Size ClientSize {
                        get {
#if notneeded
                                if ((this is Form) && (((Form)this).form_parent_window != null)) {
                                        return ((Form)this).form_parent_window.ClientSize;
                                }
#endif

                                return client_size;
                        }

                        set {
                                this.SetClientSizeCore(value.Width, value.Height);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                [DescriptionAttribute("ControlCompanyNameDescr")]
                public String CompanyName {
                        get {
                                return "Mono Project, Novell, Inc.";
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public bool ContainsFocus {
                        get {
                                IntPtr  focused_window;

                                focused_window = XplatUI.GetFocus();
                                if (IsHandleCreated) {
                                        if (focused_window == Handle) {
                                                return true;
                                        }

                                        for (int i=0; i < child_controls.Count; i++) {
                                                if (child_controls[i].ContainsFocus) {
                                                        return true;
                                                }
                                        }
                                }
                                return false;
                        }
                }

                [DefaultValue(null)]
                [MWFCategory("Behavior")]
                public virtual ContextMenu ContextMenu {
                        get {
                                return context_menu;
                        }

                        set {
                                if (context_menu != value) {
                                        context_menu = value;
                                        OnContextMenuChanged(EventArgs.Empty);
                                }
                        }
                }

                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
                public ControlCollection Controls {
                        get {
                                return this.child_controls;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public bool Created {
                        get {
                                return (!is_disposed && is_created);
                        }
                }

                [AmbientValue(null)]
                [MWFCategory("Appearance")]
                public virtual Cursor Cursor {
                        get {
                                if (cursor != null) {
                                        return cursor;
                                }

                                if (parent != null) {
                                        return parent.Cursor;
                                }

                                return Cursors.Default;
                        }

                        set {
                                if (cursor != value) {
                                        Point   pt;

                                        cursor = value;
                                        
                                        if (IsHandleCreated) {
                                                pt = Cursor.Position;

                                                if (bounds.Contains(pt) || Capture) {
                                                        if (GetChildAtPoint(pt) == null) {
                                                                if (cursor != null) {
                                                                        XplatUI.SetCursor(window.Handle, cursor.handle);
                                                                } else {
                                                                        if (parent != null) {
                                                                                XplatUI.SetCursor(window.Handle, parent.Cursor.handle);
                                                                        } else {
                                                                                XplatUI.SetCursor(window.Handle, Cursors.Default.handle);
                                                                        }
                                                                }
                                                        }
                                                }
                                        }

                                        OnCursorChanged(EventArgs.Empty);
                                }
                        }
                }


                [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
                [ParenthesizePropertyName(true)]
                [RefreshProperties(RefreshProperties.All)]
                [MWFCategory("Data")]
                public ControlBindingsCollection DataBindings {
                        get {
                                if (data_bindings == null)
                                        data_bindings = new ControlBindingsCollection (this);
                                return data_bindings;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public virtual Rectangle DisplayRectangle {
                        get {
                                return ClientRectangle;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public bool Disposing {
                        get {
                                return is_disposed;
                        }
                }

                [Localizable(true)]
                [RefreshProperties(RefreshProperties.Repaint)]
                [DefaultValue(DockStyle.None)]
                [MWFCategory("Layout")]
                public virtual DockStyle Dock {
                        get {
                                return dock_style;
                        }

                        set {
                                if (dock_style == value) {
                                        return;
                                }

                                dock_style = value;

                                if (parent != null) {
                                        parent.PerformLayout(this, "Parent");
                                }

                                OnDockChanged(EventArgs.Empty);
                        }
                }

                [DispId(-514)]
                [Localizable(true)]
                [MWFCategory("Behavior")]
                public bool Enabled {
                        get {
                                if (!is_enabled) {
                                        return false;
                                }

                                if (parent != null) {
                                        return parent.Enabled;
                                }

                                return true;
                        }

                        set {
                                if (Enabled == value) {
                                        is_enabled = value;
                                        return;
                                }

                                is_enabled = value;

                                // FIXME - we need to switch focus to next control if we're disabling the focused control

                                OnEnabledChanged (EventArgs.Empty);                             
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public virtual bool Focused {
                        get {
                                return this.has_focus;
                        }
                }

                [DispId(-512)]
                [AmbientValue(null)]
                [Localizable(true)]
                [MWFCategory("Appearance")]
                public virtual Font Font {
                        get {
                                if (font != null) {
                                        return font;
                                }

                                if (Parent != null && Parent.Font != null) {
                                        return Parent.Font;
                                }

                                return DefaultFont;
                        }

                        [param:MarshalAs(UnmanagedType.CustomMarshaler, MarshalTypeRef=typeof(Font))]
                        set {
                                if (font != null && font.Equals (value)) {
                                        return;
                                }

                                font = value;   
                                Invalidate();
                                OnFontChanged (EventArgs.Empty);                                
                        }
                }

                [DispId(-513)]
                [MWFCategory("Appearance")]
                public virtual Color ForeColor {
                        get {
                                if (foreground_color.IsEmpty) {
                                        if (parent!=null) {
                                                return parent.ForeColor;
                                        }
                                        return DefaultForeColor;
                                }
                                return foreground_color;
                        }

                        set {
                                if (foreground_color != value) {
                                        foreground_color=value;
                                        Invalidate();
                                        OnForeColorChanged(EventArgs.Empty);
                                }
                        }
                }

                [DispId(-515)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public IntPtr Handle {                                                  // IWin32Window
                        get {
#if NET_2_0
                                if (verify_thread_handle) {
                                        if (this.InvokeRequired) {
                                                throw new InvalidOperationException("Cross-thread access of handle detected. Handle access only valid on thread that created the control");
                                        }
                                }
#endif
                                if (!IsHandleCreated) {
                                        CreateHandle();
                                }
                                return window.Handle;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public bool HasChildren {
                        get {
                                if (this.child_controls.Count>0) {
                                        return true;
                                }
                                return false;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Always)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public int Height {
                        get {
                                return this.bounds.Height;
                        }

                        set {
                                SetBounds(bounds.X, bounds.Y, bounds.Width, value, BoundsSpecified.Height);
                        }
                }

                [AmbientValue(ImeMode.Inherit)]
                [Localizable(true)]
                [MWFCategory("Behavior")]
                public ImeMode ImeMode {
                        get {
                                 if (ime_mode == DefaultImeMode) {
                                        if (parent != null)
                                                return parent.ImeMode;
                                        else
                                                return ImeMode.NoControl; // default value
                                }
                                return ime_mode;
                        }

                        set {
                                if (ime_mode != value) {
                                        ime_mode = value;

                                        OnImeModeChanged(EventArgs.Empty);
                                }
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public bool InvokeRequired {                                            // ISynchronizeInvoke
                        get {
                                if (creator_thread != null && creator_thread!=Thread.CurrentThread) {
                                        return true;
                                }
                                return false;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public bool IsAccessible {
                        get {
                                return is_accessible;
                        }

                        set {
                                is_accessible = value;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public bool IsDisposed {
                        get {
                                return this.is_disposed;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public bool IsHandleCreated {
                        get {
                                if ((window != null) && (window.Handle != IntPtr.Zero)) {
                                        Hwnd hwnd = Hwnd.ObjectFromHandle (window.Handle);
                                        if (hwnd != null && !hwnd.zombie)
                                                return true;
                                }

                                return false;
                        }
                }

#if NET_2_0
                public virtual Layout.LayoutEngine LayoutEngine {
                        get { return this.layout_engine; }
                } 
#endif

                [EditorBrowsable(EditorBrowsableState.Always)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public int Left {
                        get {
                                return this.bounds.X;
                        }

                        set {
                                SetBounds(value, bounds.Y, bounds.Width, bounds.Height, BoundsSpecified.X);
                        }
                }

                [Localizable(true)]
                [MWFCategory("Layout")]
                public Point Location {
                        get {
                                return new Point(bounds.X, bounds.Y);
                        }

                        set {
                                SetBounds(value.X, value.Y, bounds.Width, bounds.Height, BoundsSpecified.Location);
                        }
                }

#if NET_2_0
                [Localizable (true)]
                public Padding Margin {
                        get { return this.margin; }
                        set { this.margin = value; }
                }
#endif

                [Browsable(false)]
                public string Name {
                        get {
                                return name;
                        }

                        set {
                                name = value;
                        }
                }

#if NET_2_0
                [Localizable(true)]
                public Padding Padding {
                        get {
                                return padding;
                        }

                        set {
                                padding = value;
                        }
                }
#endif

                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public Control Parent {
                        get {
                                return this.parent;
                        }

                        set {
                                if (value == this) {
                                        throw new ArgumentException("A circular control reference has been made. A control cannot be owned or parented to itself.");
                                }

                                if (parent!=value) {
                                        if (value==null) {
                                                parent.Controls.Remove(this);
                                                parent = null;
                                                return;
                                        }

                                        value.Controls.Add(this);
                                }
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public string ProductName {
                        get {
                                Type t = typeof (AssemblyProductAttribute);
                                Assembly assembly = GetType().Module.Assembly;
                                object [] attrs = assembly.GetCustomAttributes (t, false);
                                AssemblyProductAttribute a = null;
                                // On MS we get a NullRefException if product attribute is not
                                // set. 
                                if (attrs != null && attrs.Length > 0)
                                        a = (AssemblyProductAttribute) attrs [0];
                                return a.Product;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public string ProductVersion {
                        get {
                                Type t = typeof (AssemblyVersionAttribute);
                                Assembly assembly = GetType().Module.Assembly;
                                object [] attrs = assembly.GetCustomAttributes (t, false);
                                if (attrs == null || attrs.Length < 1)
                                        return "1.0.0.0";
                                return ((AssemblyVersionAttribute)attrs [0]).Version;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public bool RecreatingHandle {
                        get {
                                return is_recreating;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public Region Region {
                        get {
                                return clip_region;
                        }

                        set {
                                if (IsHandleCreated) {
                                        XplatUI.SetClipRegion(Handle, value);
                                }
                                clip_region = value;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public int Right {
                        get {
                                return this.bounds.X+this.bounds.Width;
                        }
                }

                [AmbientValue(RightToLeft.Inherit)]
                [Localizable(true)]
                [MWFCategory("Appearance")]
                public virtual RightToLeft RightToLeft {
                        get {
                                if (right_to_left == RightToLeft.Inherit) {
                                        if (parent != null)
                                                return parent.RightToLeft;
                                        else
                                                return RightToLeft.No; // default value
                                }
                                return right_to_left;
                        }

                        set {
                                if (value != right_to_left) {
                                        right_to_left = value;
                                        OnRightToLeftChanged(EventArgs.Empty);
                                }
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                public override ISite Site {
                        get {
                                return base.Site;
                        }

                        set {
                                base.Site = value;

                                AmbientProperties ap = (AmbientProperties) value.GetService (typeof (AmbientProperties));
                                if (ap != null) {
                                        BackColor = ap.BackColor;
                                        ForeColor = ap.ForeColor;
                                        Cursor = ap.Cursor;
                                        Font = ap.Font;
                                }
                        }
                }

                [Localizable(true)]
                [MWFCategory("Layout")]
                public Size Size {
                        get {
                                return new Size(Width, Height);
                        }

                        set {
                                SetBounds(bounds.X, bounds.Y, value.Width, value.Height, BoundsSpecified.Size);
                        }
                }

                [Localizable(true)]
                [MergableProperty(false)]
                [MWFCategory("Behavior")]
                public int TabIndex {
                        get {
                                if (tab_index != -1) {
                                        return tab_index;
                                }
                                return 0;
                        }

                        set {
                                if (tab_index != value) {
                                        tab_index = value;
                                        OnTabIndexChanged(EventArgs.Empty);
                                }
                        }
                }

                [DispId(-516)]
                [DefaultValue(true)]
                [MWFCategory("Behavior")]
                public bool TabStop {
                        get {
                                return tab_stop;
                        }

                        set {
                                if (tab_stop != value) {
                                        tab_stop = value;
                                        OnTabStopChanged(EventArgs.Empty);
                                }
                        }
                }

                [Localizable(false)]
                [Bindable(true)]
                [TypeConverter(typeof(StringConverter))]
                [DefaultValue(null)]
                [MWFCategory("Data")]
                public object Tag {
                        get {
                                return control_tag;
                        }

                        set {
                                control_tag = value;
                        }
                }

                [DispId(-517)]
                [Localizable(true)]
                [BindableAttribute(true)]
                [MWFCategory("Appearance")]
                public virtual string Text {
                        get {
                                // Our implementation ignores ControlStyles.CacheText - we always cache
                                return this.text;
                        }

                        set {
                                if (value == null) {
                                        value = String.Empty;
                                }

                                if (text!=value) {
                                        text=value;
                                        if (IsHandleCreated) {
                                                /* we need to call .SetWindowStyle here instead of just .Text
                                                   because the presence/absence of Text (== "" or not) can cause
                                                   other window style things to appear/disappear */
                                                XplatUI.SetWindowStyle(window.Handle, CreateParams);
                                                XplatUI.Text(Handle, text);
                                        }
                                        OnTextChanged (EventArgs.Empty);
                                }
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Always)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public int Top {
                        get {
                                return this.bounds.Y;
                        }

                        set {
                                SetBounds(bounds.X, value, bounds.Width, bounds.Height, BoundsSpecified.Y);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public Control TopLevelControl {
                        get {
                                Control p = this;

                                while (p.parent != null) {
                                        p = p.parent;
                                }

                                return p is Form ? p : null;
                        }
                }

                [Localizable(true)]
                [MWFCategory("Behavior")]
                public bool Visible {
                        get {
                                if (!is_visible) {
                                        return false;
                                } else if (parent != null) {
                                        return parent.Visible;
                                }

                                return true;
                        }

                        set {
                                SetVisibleCore(value);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Always)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public int Width {
                        get {
                                return this.bounds.Width;
                        }

                        set {
                                SetBounds(bounds.X, bounds.Y, value, bounds.Height, BoundsSpecified.Width);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Never)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                public IWindowTarget WindowTarget {
                        get {
                                return null;
                        }

                        set {
                                ;       // MS Internal
                        }
                }
                #endregion      // Public Instance Properties

                #region Protected Instance Properties
                protected virtual CreateParams CreateParams {
                        get {
                                CreateParams create_params = new CreateParams();

                                try {
                                        create_params.Caption = Text;
                                }
                                catch {
                                        create_params.Caption = text;
                                }

                                try {
                                        create_params.X = Left;
                                }
                                catch {
                                        create_params.X = this.bounds.X;
                                }

                                try {
                                        create_params.Y = Top;
                                }
                                catch {
                                        create_params.Y = this.bounds.Y;
                                }

                                try {
                                        create_params.Width = Width;
                                }
                                catch {
                                        create_params.Width = this.bounds.Width;
                                }

                                try {
                                        create_params.Height = Height;
                                }
                                catch {
                                        create_params.Height = this.bounds.Height;
                                }


                                create_params.ClassName = XplatUI.DefaultClassName;
                                create_params.ClassStyle = 0;
                                create_params.ExStyle = 0;
                                create_params.Param = 0;

                                if (allow_drop) {
                                        create_params.ExStyle |= (int)WindowExStyles.WS_EX_ACCEPTFILES;
                                }

                                if ((parent!=null) && (parent.IsHandleCreated)) {
                                        create_params.Parent = parent.Handle;
                                }

                                create_params.Style = (int)WindowStyles.WS_CHILD | (int)WindowStyles.WS_CLIPCHILDREN | (int)WindowStyles.WS_CLIPSIBLINGS;

                                if (is_visible) {
                                        create_params.Style |= (int)WindowStyles.WS_VISIBLE;
                                }

                                if (!is_enabled) {
                                        create_params.Style |= (int)WindowStyles.WS_DISABLED;
                                }

                                switch (border_style) {
                                case BorderStyle.FixedSingle:
                                        create_params.Style |= (int) WindowStyles.WS_BORDER;
                                        break;
                                case BorderStyle.Fixed3D:
                                        create_params.ExStyle |= (int) WindowExStyles.WS_EX_CLIENTEDGE;
                                        break;
                                }

                                return create_params;
                        }
                }

                protected virtual ImeMode DefaultImeMode {
                        get {
                                return ImeMode.Inherit;
                        }
                }

#if NET_2_0
                protected virtual Padding DefaultMargin {
                        get { return new Padding (3); }
                }
#endif

                protected virtual Size DefaultSize {
                        get {
                                return new Size(0, 0);
                        }
                }

                protected int FontHeight {
                        get {
                                return Font.Height;
                        }

                        set {
                                ;; // Nothing to do
                        }
                }

                protected bool RenderRightToLeft {
                        get {
                                return (this.right_to_left == RightToLeft.Yes);
                        }
                }

                protected bool ResizeRedraw {
                        get {
                                return GetStyle(ControlStyles.ResizeRedraw);
                        }

                        set {
                                SetStyle(ControlStyles.ResizeRedraw, value);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                protected virtual bool ShowFocusCues {
                        get {
                                return true;
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
                protected bool ShowKeyboardCues {
                        get {
                                return true;
                        }
                }
                #endregion      // Protected Instance Properties

                #region Public Static Methods
                [EditorBrowsable(EditorBrowsableState.Advanced)]
                public static Control FromChildHandle(IntPtr handle) {
                        return Control.ControlNativeWindow.ControlFromChildHandle (handle);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                public static Control FromHandle(IntPtr handle) {
                        return Control.ControlNativeWindow.ControlFromHandle(handle);
                }

                public static bool IsMnemonic(char charCode, string text) {
                        int amp;                        

                        amp = text.IndexOf('&');

                        if (amp != -1) {
                                if (amp + 1 < text.Length) {
                                        if (text[amp + 1] != '&') {
                                                if (Char.ToUpper(charCode) == Char.ToUpper(text.ToCharArray(amp + 1, 1)[0])) {
                                                        return true;
                                                }       
                                        }
                                }
                        }
                        return false;
                }
                #endregion

                #region Protected Static Methods
                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected static bool ReflectMessage(IntPtr hWnd, ref Message m) {
                        Control c;

                        c = Control.FromHandle(hWnd);

                        if (c != null) {
                                c.WndProc(ref m);
                                return true;
                        }
                        return false;
                }
                #endregion

                #region Public Instance Methods
                [EditorBrowsable(EditorBrowsableState.Advanced)]
                public IAsyncResult BeginInvoke(Delegate method) {
                        object [] prms = null;
                        if (method is EventHandler)
                                prms = new object [] { this, EventArgs.Empty };
                        return BeginInvokeInternal(method, prms, false);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                public IAsyncResult BeginInvoke (Delegate method, object[] args) {
                        return BeginInvokeInternal (method, args, false);
                }

                public void BringToFront() {
                        if (parent != null) {
                                parent.child_controls.SetChildIndex(this, 0);
                                parent.Refresh();
                        } else {
                                XplatUI.SetZOrder(Handle, IntPtr.Zero, false, false);
                        }
                }

                public bool Contains(Control ctl) {
                        while (ctl != null) {
                                ctl = ctl.parent;
                                if (ctl == this) {
                                        return true;
                                }
                        }
                        return false;
                }

                public void CreateControl() {
                        if (is_disposed) {
                                throw new ObjectDisposedException(GetType().FullName.ToString());
                        }
                        if (is_created) {
                                return;
                        }

                        if (!IsHandleCreated) {
                                CreateHandle();
                        }

                        if (!is_created) {
                                is_created = true;
                        }

                        Control [] controls = child_controls.GetAllControls ();
                        for (int i=0; i<controls.Length; i++) {
                                controls [i].CreateControl ();
                        }

                        UpdateChildrenZOrder();

                        if (binding_context == null) {  // seem to be sent whenever it's null?
                                OnBindingContextChanged(EventArgs.Empty);
                        }

                        OnCreateControl();
                }

                public Graphics CreateGraphics() {
                        if (!IsHandleCreated) {
                                this.CreateHandle();
                        }
                        return Graphics.FromHwnd(this.window.Handle);
                }

                public DragDropEffects DoDragDrop(object data, DragDropEffects allowedEffects) {
                        return XplatUI.StartDrag(this.window.Handle, data, allowedEffects);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                public object EndInvoke (IAsyncResult async_result) {
                        AsyncMethodResult result = (AsyncMethodResult) async_result;
                        return result.EndInvoke ();
                }

                public Form FindForm() {
                        Control c;

                        c = this;
                        while (c != null) {
                                if (c is Form) {
                                        return (Form)c;
                                }
                                c = c.Parent;
                        }
                        return null;
                }

                public bool Focus() {
                        if (CanFocus && IsHandleCreated && !has_focus) {
                                XplatUI.SetFocus(this.window.Handle);
                        }
                        return has_focus;
                }

                public Control GetChildAtPoint(Point pt) {
                        // Microsoft's version of this function doesn't seem to work, so I can't check
                        // if we only consider children or also grandchildren, etc.
                        // I'm gonna say 'children only'
                        for (int i=0; i<child_controls.Count; i++) {
                                if (child_controls[i].Bounds.Contains(pt)) {
                                        return child_controls[i];
                                }
                        }
                        return null;
                }

                public IContainerControl GetContainerControl() {
                        Control current = this;

                        while (current!=null) {
                                if ((current is IContainerControl) && ((current.control_style & ControlStyles.ContainerControl)!=0)) {
                                        return (IContainerControl)current;
                                }
                                current = current.parent;
                        }
                        return null;
                }

                public Control GetNextControl(Control ctl, bool forward) {

                        if (ctl != null && this != ctl) {
                                if (!ctl.CanSelect || 
                                        ((parent == null) && (ctl is IContainerControl) && ctl.GetStyle(ControlStyles.ContainerControl))
                                   ) {
                                        if (forward) {
                                                return FindFlatForward(this, ctl);
                                        } else {
                                                return FindFlatBackward(this, ctl);
                                        }
                                }
                        }

                        // If ctl is not contained by this, we start at the first child of this
                        if (!this.Contains(ctl)) {
                                ctl = null;
                        }

                        // Search through our controls, starting at ctl, stepping into children as we encounter them
                        // try to find the control with the tabindex closest to our own, or, if we're looking into
                        // child controls, the one with the smallest tabindex
                        if (forward) {
                                return FindControlForward(this, ctl);
                        }
                        return FindControlBackward(this, ctl);
                }

#if NET_2_0
                public virtual Size GetPreferredSize (Size proposedSize) {
                        return preferred_size;
                }
#endif

                public void Hide() {
                        this.Visible = false;
                }

                public void Invalidate() {
                        Invalidate(ClientRectangle, false);
                }

                public void Invalidate(bool invalidateChildren) {
                        Invalidate(ClientRectangle, invalidateChildren);
                }

                public void Invalidate(System.Drawing.Rectangle rc) {
                        Invalidate(rc, false);
                }

                public void Invalidate(System.Drawing.Rectangle rc, bool invalidateChildren) {
                        if (!IsHandleCreated || !Visible || rc.Width == 0 || rc.Height == 0) {
                                return;
                        }

                        NotifyInvalidate(rc);

                        XplatUI.Invalidate(Handle, rc, false);

                        if (invalidateChildren) {
                                Control [] controls = child_controls.GetAllControls ();
                                for (int i=0; i<controls.Length; i++)
                                        controls [i].Invalidate ();
                        }
                        OnInvalidated(new InvalidateEventArgs(rc));
                }

                public void Invalidate(System.Drawing.Region region) {
                        Invalidate(region, false);
                }

                public void Invalidate(System.Drawing.Region region, bool invalidateChildren) {
                        RectangleF bounds = region.GetBounds (CreateGraphics ());
                        Invalidate (new Rectangle ((int) bounds.X, (int) bounds.Y, (int) bounds.Width, (int) bounds.Height),
                                        invalidateChildren);
                }

                public object Invoke (Delegate method) {
                        object [] prms = null;
                        if (method is EventHandler)
                                prms = new object [] { this, EventArgs.Empty };

                        return Invoke(method, prms);
                }

                public object Invoke (Delegate method, object[] args) {
                        if (!this.InvokeRequired) {
                                return method.DynamicInvoke(args);
                        }

                        IAsyncResult result = BeginInvoke (method, args);
                        return EndInvoke(result);
                }

                internal object InvokeInternal (Delegate method, bool disposing) {
                        return InvokeInternal(method, null, disposing);
                }

                internal object InvokeInternal (Delegate method, object[] args, bool disposing) {
                        if (!this.InvokeRequired) {
                                return method.DynamicInvoke(args);
                        }

                        IAsyncResult result = BeginInvokeInternal (method, args, disposing);
                        return EndInvoke(result);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                public void PerformLayout() {
                        PerformLayout(null, null);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                public void PerformLayout(Control affectedControl, string affectedProperty) {
                        LayoutEventArgs levent = new LayoutEventArgs(affectedControl, affectedProperty);

                        if (layout_suspended > 0) {
                                layout_pending = true;
                                return;
                        }

                        layout_pending = false;

                        // Prevent us from getting messed up
                        layout_suspended++;

                        // Perform all Dock and Anchor calculations
                        try {

#if NET_2_0
                        this.layout_engine.Layout(this, levent);
#else           
                                // This has been moved to Layout/DefaultLayout.cs for 2.0, please duplicate any changes/fixes there.
                                Control         child;
                                AnchorStyles    anchor;
                                Rectangle       space;

                                space = DisplayRectangle;

                                // Deal with docking; go through in reverse, MS docs say that lowest Z-order is closest to edge
                                Control [] controls = child_controls.GetAllControls ();
                                for (int i = controls.Length - 1; i >= 0; i--) {
                                        child = controls [i];

                                        if (!child.Visible) {
                                                continue;
                                        }

                                        switch (child.Dock) {
                                                case DockStyle.None: {
                                                        // Do nothing
                                                        break;
                                                }

                                                case DockStyle.Left: {
                                                        child.SetBounds(space.Left, space.Y, child.Width, space.Height);
                                                        space.X+=child.Width;
                                                        space.Width-=child.Width;
                                                        break;
                                                }

                                                case DockStyle.Top: {
                                                        child.SetBounds(space.Left, space.Y, space.Width, child.Height);
                                                        space.Y+=child.Height;
                                                        space.Height-=child.Height;
                                                        break;
                                                }
                                        
                                                case DockStyle.Right: {
                                                        child.SetBounds(space.Right-child.Width, space.Y, child.Width, space.Height);
                                                        space.Width-=child.Width;
                                                        break;
                                                }

                                                case DockStyle.Bottom: {
                                                        child.SetBounds(space.Left, space.Bottom-child.Height, space.Width, child.Height);
                                                        space.Height-=child.Height;
                                                        break;
                                                }
                                        }
                                }

                                for (int i = controls.Length - 1; i >= 0; i--) {
                                        child=controls[i];

                                        //if (child.Visible && (child.Dock == DockStyle.Fill)) {
                                        if (child.Dock == DockStyle.Fill) {
                                                child.SetBounds(space.Left, space.Top, space.Width, space.Height);
                                        }
                                }

                                space = DisplayRectangle;

                                for (int i=0; i < controls.Length; i++) {
                                        int left;
                                        int top;
                                        int width;
                                        int height;

                                        child = controls[i];

                                        // If the control is docked we don't need to do anything
                                        if (child.Dock != DockStyle.None) {
                                                continue;
                                        }

                                        anchor = child.Anchor;

                                        left = child.Left;
                                        top = child.Top;
                                        width = child.Width;
                                        height = child.Height;

                                        if ((anchor & AnchorStyles.Left) !=0 ) {
                                                if ((anchor & AnchorStyles.Right) != 0) {
                                                        width = space.Width - child.dist_right - left;
                                                } else {
                                                        ; // Left anchored only, nothing to be done
                                                }
                                        } else if ((anchor & AnchorStyles.Right) != 0) {
                                                left = space.Width - child.dist_right - width;
                                        } else {
                                                // left+=diff_width/2 will introduce rounding errors (diff_width removed from svn after r51780)
                                                // This calculates from scratch every time:
                                                left = child.dist_left + (space.Width - (child.dist_left + width + child.dist_right)) / 2;
                                        }

                                        if ((anchor & AnchorStyles.Top) !=0 ) {
                                                if ((anchor & AnchorStyles.Bottom) != 0) {
                                                        height = space.Height - child.dist_bottom - top;
                                                } else {
                                                        ; // Top anchored only, nothing to be done
                                                }
                                        } else if ((anchor & AnchorStyles.Bottom) != 0) {
                                                top = space.Height - child.dist_bottom - height;
                                        } else {
                                                // top += diff_height/2 will introduce rounding errors (diff_height removed from after r51780)
                                                // This calculates from scratch every time:
                                                top = child.dist_top + (space.Height - (child.dist_top + height + child.dist_bottom)) / 2;
                                        }
                                        
                                        // Sanity
                                        if (width < 0) {
                                                width=0;
                                        }

                                        if (height < 0) {
                                                height=0;
                                        }

                                        child.SetBounds(left, top, width, height);
                                }
#endif

                                // Let everyone know
                                OnLayout(levent);
                        }

                                // Need to make sure we decremend layout_suspended
                        finally {
                                layout_suspended--;
                        }
                }

                public Point PointToClient (Point p) {
                        int x = p.X;
                        int y = p.Y;

                        XplatUI.ScreenToClient (Handle, ref x, ref y);

                        return new Point (x, y);
                }

                public Point PointToScreen(Point p) {
                        int x = p.X;
                        int y = p.Y;

                        XplatUI.ClientToScreen(Handle, ref x, ref y);

                        return new Point(x, y);
                }

                public virtual bool PreProcessMessage(ref Message msg) {
                        return InternalPreProcessMessage (ref msg);
                }

                internal virtual bool InternalPreProcessMessage (ref Message msg) {
                        Keys key_data;

                        if ((msg.Msg == (int)Msg.WM_KEYDOWN) || (msg.Msg == (int)Msg.WM_SYSKEYDOWN)) {
                                key_data = (Keys)msg.WParam.ToInt32() | XplatUI.State.ModifierKeys;

                                if (!ProcessCmdKey(ref msg, key_data)) {
                                        if (IsInputKey(key_data)) {
                                                return false;
                                        }

                                        return ProcessDialogKey(key_data);
                                }

                                return true;
                        } else if (msg.Msg == (int)Msg.WM_CHAR) {
                                if (IsInputChar((char)msg.WParam)) {
                                        return false;
                                }
                                return ProcessDialogChar((char)msg.WParam);
                        } else if (msg.Msg == (int)Msg.WM_SYSCHAR) {
                                return ProcessDialogChar((char)msg.WParam);
                        }
                        return false;
                }

                public Rectangle RectangleToClient(Rectangle r) {
                        return new Rectangle(PointToClient(r.Location), r.Size);
                }

                public Rectangle RectangleToScreen(Rectangle r) {
                        return new Rectangle(PointToScreen(r.Location), r.Size);
                }

                public virtual void Refresh() {                 
                        if (IsHandleCreated == true) {
                                Invalidate();
                                XplatUI.UpdateWindow(window.Handle);

                                Control [] controls = child_controls.GetAllControls ();
                                for (int i=0; i < controls.Length; i++) {
                                        controls[i].Refresh();
                                }
                                
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Never)]
                public virtual void ResetBackColor() {
                        BackColor = Color.Empty;
                }

                [EditorBrowsable(EditorBrowsableState.Never)]
                public void ResetBindings() {
                        data_bindings.Clear();
                }

                [EditorBrowsable(EditorBrowsableState.Never)]
                public virtual void ResetCursor() {
                        Cursor = null;
                }

                [EditorBrowsable(EditorBrowsableState.Never)]
                public virtual void ResetFont() {
                        font = null;
                }

                [EditorBrowsable(EditorBrowsableState.Never)]
                public virtual void ResetForeColor() {
                        foreground_color = Color.Empty;
                }

                [EditorBrowsable(EditorBrowsableState.Never)]
                public void ResetImeMode() {
                        ime_mode = DefaultImeMode;
                }

                [EditorBrowsable(EditorBrowsableState.Never)]
                public virtual void ResetRightToLeft() {
                        right_to_left = RightToLeft.Inherit;
                }

                public virtual void ResetText() {
                        text = String.Empty;
                }

                public void ResumeLayout() {
                        ResumeLayout (true);
                }

                public void ResumeLayout(bool performLayout) {
                        if (layout_suspended > 0) {
                                layout_suspended--;
                        }

                        if (layout_suspended == 0) {
                                Control [] controls = child_controls.GetAllControls ();
                                for (int i=0; i<controls.Length; i++) {
                                        controls [i].UpdateDistances ();
                                }

                                if (performLayout && layout_pending) {
                                        PerformLayout();
                                }
                        }
                }

                public void Scale(float ratio) {
                        ScaleCore(ratio, ratio);
                }

                public void Scale(float dx, float dy) {
                        ScaleCore(dx, dy);
                }

#if NET_2_0
                public void Scale(SizeF factor) {
                        ScaleCore(factor.Width, factor.Height);
                }
#endif

                public void Select() {
                        Select(false, false);
                }

                public bool SelectNextControl(Control ctl, bool forward, bool tabStopOnly, bool nested, bool wrap) {
                        Control c;

                        c = ctl;
                        do {
                                c = GetNextControl(c, forward);
                                if (c == null) {
                                        if (wrap) {
                                                wrap = false;
                                                continue;
                                        }
                                        break;
                                }

                                if (c.CanSelect && ((c.parent == this) || nested) && (c.tab_stop || !tabStopOnly)) {
                                        c.Select (true, true);
                                        return true;
                                }
                        } while (c != ctl);     // If we wrap back to ourselves we stop

                        return false;
                }

                public void SendToBack() {
                        if (parent != null) {
                                parent.child_controls.SetChildIndex(this, parent.child_controls.Count);
                        }
                }

                public void SetBounds(int x, int y, int width, int height) {
                        SetBounds(x, y, width, height, BoundsSpecified.All);
                }

                public void SetBounds(int x, int y, int width, int height, BoundsSpecified specified) {
                        if ((specified & BoundsSpecified.X) != BoundsSpecified.X) {
                                x = Left;
                        }

                        if ((specified & BoundsSpecified.Y) != BoundsSpecified.Y) {
                                y = Top;
                        }

                        if ((specified & BoundsSpecified.Width) != BoundsSpecified.Width) {
                                width = Width;
                        }

                        if ((specified & BoundsSpecified.Height) != BoundsSpecified.Height) {
                                height = Height;
                        }

                        SetBoundsCore(x, y, width, height, specified);
                        if (parent != null) {
                                parent.PerformLayout(this, "Bounds");
                        }
                }

                public void Show() {
                        if (!is_created) {
                                this.CreateControl();
                        }

                        this.Visible=true;
                }

                public void SuspendLayout() {
                        layout_suspended++;
                }

                public void Update() {
                        if (IsHandleCreated) {
                                XplatUI.UpdateWindow(window.Handle);
                        }
                }
                #endregion      // Public Instance Methods

                #region Protected Instance Methods
                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [MonoTODO("Implement this and tie it into Control.ControlAccessibleObject.NotifyClients")]
                protected void AccessibilityNotifyClients(AccessibleEvents accEvent, int childID) {
                        throw new NotImplementedException();
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual AccessibleObject CreateAccessibilityInstance() {
                        return new Control.ControlAccessibleObject(this);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual ControlCollection CreateControlsInstance() {
                        return new ControlCollection(this);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void CreateHandle() {
                        if (IsDisposed) {
                                throw new ObjectDisposedException(GetType().FullName.ToString());
                        }

                        if (IsHandleCreated && !is_recreating) {
                                return;
                        }

                        window.CreateHandle(CreateParams);

                        if (window.Handle != IntPtr.Zero) {
                                lock (Control.controls) {
                                        if (!Control.controls.Contains(window.Handle)) {
                                                Control.controls.Add(this);
                                        }
                                }

                                creator_thread = Thread.CurrentThread;

                                XplatUI.EnableWindow(window.Handle, is_enabled);
                                XplatUI.SetVisible(window.Handle, is_visible, true);

                                if (clip_region != null) {
                                        XplatUI.SetClipRegion(Handle, clip_region);
                                }

                                // Set our handle with our parent
                                if ((parent != null) && (parent.IsHandleCreated)) {
                                        XplatUI.SetParent(window.Handle, parent.Handle);
                                }

                                // Set our handle as parent for our children
                                Control [] children;

                                children = child_controls.GetAllControls ();
                                for (int i = 0; i < children.Length; i++ ) {
                                        if (!children[i].RecreatingHandle)
                                                XplatUI.SetParent(children[i].Handle, window.Handle); 
                                }

                                UpdateStyles();
                                XplatUI.SetAllowDrop (Handle, allow_drop);

                                // Find out where the window manager placed us
                                if ((CreateParams.Style & (int)WindowStyles.WS_CHILD) != 0) {
                                        XplatUI.SetBorderStyle(window.Handle, (FormBorderStyle)border_style);
                                }
                                UpdateBounds();

                                OnHandleCreated(EventArgs.Empty);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void DefWndProc(ref Message m) {
                        window.DefWndProc(ref m);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void DestroyHandle() {
                        if (IsHandleCreated) {
                                if (window != null) {
                                        window.DestroyHandle();
                                }
                        }
                }

                protected bool GetStyle(ControlStyles flag) {
                        return (control_style & flag) != 0;
                }

                protected bool GetTopLevel() {
                        return is_toplevel;
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void InitLayout() {
                        UpdateDistances();
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected void InvokeGotFocus(Control toInvoke, EventArgs e) {
                        toInvoke.OnGotFocus(e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected void InvokeLostFocus(Control toInvoke, EventArgs e) {
                        toInvoke.OnLostFocus(e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected void InvokeOnClick(Control toInvoke, EventArgs e) {
                        toInvoke.OnClick(e);
                }

                protected void InvokePaint(Control toInvoke, PaintEventArgs e) {
                        toInvoke.OnPaint(e);
                }

                protected void InvokePaintBackground(Control toInvoke, PaintEventArgs e) {
                        toInvoke.OnPaintBackground(e);
                }

                protected virtual bool IsInputChar (char charCode) {
                        return true;
                }

                protected virtual bool IsInputKey (Keys keyData) {
                        // Doc says this one calls IsInputChar; not sure what to do with that
                        return false;
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void NotifyInvalidate(Rectangle invalidatedArea) {
                        // override me?
                }

                protected virtual bool ProcessCmdKey(ref Message msg, Keys keyData) {
                        if ((context_menu != null) && context_menu.ProcessCmdKey(ref msg, keyData)) {
                                return true;
                        }

                        if (parent != null) {
                                return parent.ProcessCmdKey(ref msg, keyData);
                        }

                        return false;
                }

                protected virtual bool ProcessDialogChar(char charCode) {
                        if (parent != null) {
                                return parent.ProcessDialogChar (charCode);
                        }

                        return false;
                }

                protected virtual bool ProcessDialogKey (Keys keyData) {
                        if (parent != null) {
                                return parent.ProcessDialogKey (keyData);
                        }

                        return false;
                }

                protected virtual bool ProcessKeyEventArgs (ref Message msg)
                {
                        KeyEventArgs            key_event;

                        switch (msg.Msg) {
                                case (int)Msg.WM_SYSKEYDOWN:
                                case (int)Msg.WM_KEYDOWN: {
                                        key_event = new KeyEventArgs ((Keys)msg.WParam.ToInt32 ());
                                        OnKeyDown (key_event);
                                        return key_event.Handled;
                                }

                                case (int)Msg.WM_SYSKEYUP:
                                case (int)Msg.WM_KEYUP: {
                                        key_event = new KeyEventArgs ((Keys)msg.WParam.ToInt32 ());
                                        OnKeyUp (key_event);
                                        return key_event.Handled;
                                }

                                case (int)Msg.WM_SYSCHAR:
                                case (int)Msg.WM_CHAR: {
                                        KeyPressEventArgs       key_press_event;

                                        key_press_event = new KeyPressEventArgs((char)msg.WParam);
                                        OnKeyPress(key_press_event);
#if NET_2_0
                                        msg.WParam = (IntPtr)key_press_event.KeyChar;
#endif
                                        return key_press_event.Handled;
                                }

                                default: {
                                        break;
                                }
                        }

                        return false;
                }

                protected internal virtual bool ProcessKeyMessage(ref Message msg) {
                        if (parent != null) {
                                if (parent.ProcessKeyPreview(ref msg)) {
                                        return true;
                                }
                        }

                        return ProcessKeyEventArgs(ref msg);
                }

                protected virtual bool ProcessKeyPreview(ref Message msg) {
                        if (parent != null) {
                                return parent.ProcessKeyPreview(ref msg);
                        }

                        return false;
                }

                protected virtual bool ProcessMnemonic(char charCode) {
                        // override me
                        return false;
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected void RaiseDragEvent(object key, DragEventArgs e) {
                        // MS Internal
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected void RaiseKeyEvent(object key, KeyEventArgs e) {
                        // MS Internal
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected void RaiseMouseEvent(object key, MouseEventArgs e) {
                        // MS Internal
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected void RaisePaintEvent(object key, PaintEventArgs e) {
                        // MS Internal
                }

                private void SetIsRecreating ()
                {
                        is_recreating=true;

                        foreach (Control c in Controls.GetAllControls()) {
                                c.SetIsRecreating ();
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected void RecreateHandle() {
#if DebugRecreate
                        Console.WriteLine("Recreating control {0}", XplatUI.Window(window.Handle));
#endif

                        SetIsRecreating ();

                        if (IsHandleCreated) {
#if DebugRecreate
                                Console.WriteLine(" + handle is created, destroying it.");
#endif
                                DestroyHandle();
                                // WM_DESTROY will CreateHandle for us
                        } else {
#if DebugRecreate
                                Console.WriteLine(" + handle is not created, creating it.");
#endif
                                if (!is_created) {
                                        CreateControl();
                                } else {
                                        CreateHandle();
                                }

                                is_recreating = false;
#if DebugRecreate
                                Console.WriteLine (" + new handle = {0:X}", Handle.ToInt32());
#endif
                        }

                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected void ResetMouseEventArgs() {
                        // MS Internal
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected ContentAlignment RtlTranslateAlignment(ContentAlignment align) {
                        if (right_to_left == RightToLeft.No) {
                                return align;
                        }

                        switch (align) {
                                case ContentAlignment.TopLeft: {
                                        return ContentAlignment.TopRight;
                                }

                                case ContentAlignment.TopRight: {
                                        return ContentAlignment.TopLeft;
                                }

                                case ContentAlignment.MiddleLeft: {
                                        return ContentAlignment.MiddleRight;
                                }

                                case ContentAlignment.MiddleRight: {
                                        return ContentAlignment.MiddleLeft;
                                }

                                case ContentAlignment.BottomLeft: {
                                        return ContentAlignment.BottomRight;
                                }

                                case ContentAlignment.BottomRight: {
                                        return ContentAlignment.BottomLeft;
                                }

                                default: {
                                        // if it's center it doesn't change
                                        return align;
                                }
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected HorizontalAlignment RtlTranslateAlignment(HorizontalAlignment align) {
                        if ((right_to_left == RightToLeft.No) || (align == HorizontalAlignment.Center)) {
                                return align;
                        }

                        if (align == HorizontalAlignment.Left) {
                                return HorizontalAlignment.Right;
                        }

                        // align must be HorizontalAlignment.Right
                        return HorizontalAlignment.Left;
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected LeftRightAlignment RtlTranslateAlignment(LeftRightAlignment align) {
                        if (right_to_left == RightToLeft.No) {
                                return align;
                        }

                        if (align == LeftRightAlignment.Left) {
                                return LeftRightAlignment.Right;
                        }

                        // align must be LeftRightAlignment.Right;
                        return LeftRightAlignment.Left;
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected ContentAlignment RtlTranslateContent(ContentAlignment align) {
                        return RtlTranslateAlignment(align);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected HorizontalAlignment RtlTranslateHorizontal(HorizontalAlignment align) {
                        return RtlTranslateAlignment(align);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected LeftRightAlignment RtlTranslateLeftRight(LeftRightAlignment align) {
                        return RtlTranslateAlignment(align);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void ScaleCore(float dx, float dy) {
                        Point   location;
                        Size    size;

                        SuspendLayout();

                        location = new Point((int)(Left * dx), (int)(Top * dy));
                        size = this.ClientSize;

                        if (!GetStyle(ControlStyles.FixedWidth)) {
                                size.Width = (int)(size.Width * dx);
                        }

                        if (!GetStyle(ControlStyles.FixedHeight)) {
                                size.Height = (int)(size.Height * dy);
                        }

                        SetBounds(location.X, location.Y, size.Width, size.Height, BoundsSpecified.All);

                        /* Now scale our children */
                        Control [] controls = child_controls.GetAllControls ();
                        for (int i=0; i < controls.Length; i++) {
                                controls[i].Scale(dx, dy);
                        }

                        ResumeLayout();
                }

                protected virtual void Select(bool directed, bool forward) {
                        IContainerControl       container;
                        
                        container = GetContainerControl();
                        if (container != null)
                                container.ActiveControl = this;
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void SetBoundsCore(int x, int y, int width, int height, BoundsSpecified specified) {
                        // SetBoundsCore updates the Win32 control itself. UpdateBounds updates the controls variables and fires events, I'm guessing - pdb
                        if (IsHandleCreated) {
                                XplatUI.SetWindowPos(Handle, x, y, width, height);
                        }

                        UpdateBounds(x, y, width, height);

                        UpdateDistances();
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void SetClientSizeCore(int x, int y) {
                        // Calculate the actual window size from the client size (it usually stays the same or grows)
                        Rectangle       ClientRect;
                        Rectangle       WindowRect;
                        CreateParams    cp;

                        ClientRect = new Rectangle(0, 0, x, y);
                        cp = this.CreateParams;

                        if (XplatUI.CalculateWindowRect(ref ClientRect, cp.Style, cp.ExStyle, null, out WindowRect)==false) {
                                return;
                        }

                        SetBounds(bounds.X, bounds.Y, WindowRect.Width, WindowRect.Height, BoundsSpecified.Size);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected void SetStyle(ControlStyles flag, bool value) {
                        if (value) {
                                control_style |= flag;
                        } else {
                                control_style &= ~flag;
                        }
                }

                protected void SetTopLevel(bool value) {
                        if ((GetTopLevel() != value) && (parent != null)) {
                                throw new Exception();
                        }

                        if (this is Form) {
                                if (value == true) {
                                        if (!Visible) {
                                                Visible = true;
                                        }
                                } else {
                                        if (Visible) {
                                                Visible = false;
                                        }
                                }
                        }
                        is_toplevel = value;
                }

                protected virtual void SetVisibleCore(bool value) {
                        if (value!=is_visible) {
                                if (value && (window.Handle == IntPtr.Zero) || !is_created) {
                                        CreateControl();
                                }

                                is_visible=value;

                                if (IsHandleCreated) {
                                        XplatUI.SetVisible(Handle, value, true);
                                        // Explicitly move Toplevel windows to where we want them;
                                        // apparently moving unmapped toplevel windows doesn't work
                                        if (is_visible && (this is Form)) {
                                                XplatUI.SetWindowPos(window.Handle, bounds.X, bounds.Y, bounds.Width, bounds.Height);
                                        }
                                }

                                OnVisibleChanged(EventArgs.Empty);

                                if (value == false && parent != null && Focused) {
                                        Control container;

                                        // Need to start at parent, GetContainerControl might return ourselves if we're a container
                                        container = (Control)parent.GetContainerControl();
                                        if (container != null) {
                                                container.SelectNextControl(this, true, true, true, true);
                                        }
                                }

                                if (parent != null) {
                                        parent.PerformLayout(this, "visible");
                                } else {
                                        PerformLayout(this, "visible");
                                }
                        }
                }
        
                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected void UpdateBounds() {
                        int     x;
                        int     y;
                        int     width;
                        int     height;
                        int     client_width;
                        int     client_height;

                        if (!IsHandleCreated) {
                                CreateHandle();
                        }

                        XplatUI.GetWindowPos(this.Handle, this is Form, out x, out y, out width, out height, out client_width, out client_height);

                        UpdateBounds(x, y, width, height, client_width, client_height);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected void UpdateBounds(int x, int y, int width, int height) {
                        CreateParams    cp;
                        Rectangle       rect;

                        // Calculate client rectangle
                        rect = new Rectangle(0, 0, 0, 0);
                        cp = CreateParams;

                        XplatUI.CalculateWindowRect(ref rect, cp.Style, cp.ExStyle, cp.menu, out rect);
                        UpdateBounds(x, y, width, height, width - (rect.Right - rect.Left), height - (rect.Bottom - rect.Top));
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected void UpdateBounds(int x, int y, int width, int height, int clientWidth, int clientHeight) {
                        // UpdateBounds only seems to set our sizes and fire events but not update the GUI window to match
                        bool    moved   = false;
                        bool    resized = false;

                        // Needed to generate required notifications
                        if ((this.bounds.X!=x) || (this.bounds.Y!=y)) {
                                moved=true;
                        }

                        if ((this.Bounds.Width!=width) || (this.Bounds.Height!=height)) {
                                resized=true;
                        }

                        bounds.X=x;
                        bounds.Y=y;
                        bounds.Width=width;
                        bounds.Height=height;

                        client_size.Width=clientWidth;
                        client_size.Height=clientHeight;

                        if (moved) {
                                OnLocationChanged(EventArgs.Empty);
                        }

                        if (resized) {
                                OnSizeChanged(EventArgs.Empty);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected void UpdateStyles() {
                        if (!IsHandleCreated) {
                                return;
                        }

                        XplatUI.SetWindowStyle(window.Handle, CreateParams);
                        OnStyleChanged(EventArgs.Empty);
                }

                private void UpdateZOrderOfChild(Control child) {
                        if (IsHandleCreated && child.IsHandleCreated && (child.parent == this)) {
                                int     index;

                                index = child_controls.IndexOf(child);

                                if (index > 0) {
                                        XplatUI.SetZOrder(child.Handle, child_controls[index - 1].Handle, false, false);
                                } else {
                                        XplatUI.SetZOrder(child.Handle, IntPtr.Zero, true, false);
                                }
                        }
                }

                private void UpdateChildrenZOrder() {
                        Control [] controls;

                        if (!IsHandleCreated) {
                                return;
                        }

                        controls = child_controls.GetAllControls ();
                        for (int i = 1; i < controls.Length; i++ ) {
                                XplatUI.SetZOrder(controls[i].Handle, controls[i-1].Handle, false, false);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected void UpdateZOrder() {
                        if (parent != null) {
                                parent.UpdateZOrderOfChild(this);
                        }
                }

                protected virtual void WndProc(ref Message m) {
#if debug
                        Console.WriteLine("Control {0} received message {1}", window.Handle == IntPtr.Zero ? this.Text : XplatUI.Window(window.Handle), (Msg)m.Msg);
#endif
                        if ((this.control_style & ControlStyles.EnableNotifyMessage) != 0) {
                                OnNotifyMessage(m);
                        }

                        switch((Msg)m.Msg) {
                                case Msg.WM_DESTROY: {
                                        OnHandleDestroyed(EventArgs.Empty);
#if DebugRecreate
                                        IntPtr handle = window.Handle;
#endif
                                        window.InvalidateHandle();

                                        if (is_recreating) {
#if DebugRecreate
                                                Console.WriteLine ("Creating handle for {0:X}", handle.ToInt32());
#endif
                                                CreateHandle();
#if DebugRecreate
                                                Console.WriteLine (" + new handle = {0:X}", Handle.ToInt32());
#endif
                                                is_recreating = false;
                                        }
                                        return;
                                }

                                case Msg.WM_WINDOWPOSCHANGED: {
                                        if (Visible) {
                                                UpdateBounds();
                                                if (GetStyle(ControlStyles.ResizeRedraw)) {
                                                        Invalidate();
                                                }
                                        }
                                        return;
                                }

                                // Nice description of what should happen when handling WM_PAINT
                                // can be found here: http://pluralsight.com/wiki/default.aspx/Craig/FlickerFreeControlDrawing.html
                                // and here http://msdn.microsoft.com/msdnmag/issues/06/03/WindowsFormsPerformance/
                                case Msg.WM_PAINT: {
                                        PaintEventArgs  paint_event;

                                        paint_event = XplatUI.PaintEventStart(Handle, true);

                                        if (paint_event == null) {
                                                return;
                                        }

                                        if (invalid_region != null && !invalid_region.IsVisible (paint_event.ClipRectangle)) {
                                                // Just blit the previous image
                                                paint_event.Graphics.DrawImage (ImageBuffer, paint_event.ClipRectangle, paint_event.ClipRectangle, GraphicsUnit.Pixel);
                                                XplatUI.PaintEventEnd(Handle, true);
                                                return;
                                        }

                                        Graphics dc = null;
                                        Graphics back_dc = null;
                                        Bitmap backbuffer = null;
                                        if (ThemeEngine.Current.DoubleBufferingSupported) {
                                                if ((control_style & ControlStyles.DoubleBuffer) != 0) {
                                                        backbuffer = ImageBuffer;
                                                        back_dc = Graphics.FromImage (backbuffer);
                                                        dc = paint_event.SetGraphics (back_dc);
                                                }
                                        }

                                        if (!GetStyle(ControlStyles.Opaque)) {
                                                OnPaintBackground(paint_event);
                                        }

                                        // Button-derived controls choose to ignore their Opaque style, give them a chance to draw their background anyways
                                        OnPaintBackgroundInternal(paint_event);

                                        OnPaintInternal(paint_event);
                                        if (!paint_event.Handled) {
                                                OnPaint(paint_event);
                                        }

                                        if (ThemeEngine.Current.DoubleBufferingSupported)
                                                if ((control_style & ControlStyles.DoubleBuffer) != 0) {
                                                        dc.DrawImage (ImageBuffer, paint_event.ClipRectangle, paint_event.ClipRectangle, GraphicsUnit.Pixel);
                                                        paint_event.SetGraphics (dc);
                                                        invalid_region.Exclude (paint_event.ClipRectangle);
                                                        back_dc.Dispose ();
                                                        if (backbuffer != bmp_mem)
                                                                backbuffer.Dispose();
                                                }

                                        XplatUI.PaintEventEnd(Handle, true);

                                        return;
                                }
                                        
                                case Msg.WM_ERASEBKGND: {
                                        // The DefWndProc will never have to handle this, we always paint the background in managed code
                                        // In theory this code would look at ControlStyles.AllPaintingInWmPaint and and call OnPaintBackground
                                        // here but it just makes things more complicated...
                                        m.Result = (IntPtr)1;
                                        return;
                                }

                                case Msg.WM_LBUTTONUP: {
                                        MouseEventArgs me;

                                        me = new MouseEventArgs (FromParamToMouseButtons ((int) m.WParam.ToInt32()) | MouseButtons.Left, 
                                                mouse_clicks, 
                                                LowOrder ((int) m.LParam.ToInt32 ()), HighOrder ((int) m.LParam.ToInt32 ()), 
                                                0);

                                        HandleClick(mouse_clicks, me);
                                        OnMouseUp (me);

                                        if (InternalCapture) {
                                                InternalCapture = false;
                                        }

                                        if (mouse_clicks > 1) {
                                                mouse_clicks = 1;
                                        }
                                        return;
                                }
                                        
                                case Msg.WM_LBUTTONDOWN: {
                                        if (CanSelect) {
                                                Select (true, true);
                                        }
                                        InternalCapture = true;
                                        OnMouseDown (new MouseEventArgs (FromParamToMouseButtons ((int) m.WParam.ToInt32()), 
                                                mouse_clicks, LowOrder ((int) m.LParam.ToInt32 ()), HighOrder ((int) m.LParam.ToInt32 ()), 
                                                0));
                                                
                                        return;
                                }

                                case Msg.WM_LBUTTONDBLCLK: {
                                        InternalCapture = true;
                                        mouse_clicks++;
                                        OnMouseDown (new MouseEventArgs (FromParamToMouseButtons ((int) m.WParam.ToInt32()), 
                                                mouse_clicks, LowOrder ((int) m.LParam.ToInt32 ()), HighOrder ((int) m.LParam.ToInt32 ()), 
                                                0));

                                        return;
                                }

                                case Msg.WM_MBUTTONUP: {
                                        MouseEventArgs me;

                                        me = new MouseEventArgs (FromParamToMouseButtons ((int) m.WParam.ToInt32()) | MouseButtons.Middle, 
                                                mouse_clicks, 
                                                LowOrder ((int) m.LParam.ToInt32 ()), HighOrder ((int) m.LParam.ToInt32 ()), 
                                                0);

                                        HandleClick(mouse_clicks, me);
                                        OnMouseUp (me);
                                        if (InternalCapture) {
                                                InternalCapture = false;
                                        }
                                        if (mouse_clicks > 1) {
                                                mouse_clicks = 1;
                                        }
                                        return;
                                }
                                        
                                case Msg.WM_MBUTTONDOWN: {                                      
                                        InternalCapture = true;
                                        OnMouseDown (new MouseEventArgs (FromParamToMouseButtons ((int) m.WParam.ToInt32()), 
                                                mouse_clicks, LowOrder ((int) m.LParam.ToInt32 ()), HighOrder ((int) m.LParam.ToInt32 ()), 
                                                0));
                                                
                                        return;
                                }

                                case Msg.WM_MBUTTONDBLCLK: {
                                        InternalCapture = true;
                                        mouse_clicks++;
                                        OnMouseDown (new MouseEventArgs (FromParamToMouseButtons ((int) m.WParam.ToInt32()), 
                                                mouse_clicks, LowOrder ((int) m.LParam.ToInt32 ()), HighOrder ((int) m.LParam.ToInt32 ()), 
                                                0));
                                        return;
                                }

                                case Msg.WM_RBUTTONUP: {
                                        MouseEventArgs  me;
                                        Point           pt;

                                        pt = new Point(LowOrder ((int) m.LParam.ToInt32 ()), HighOrder ((int) m.LParam.ToInt32 ()));
                                        pt = PointToScreen(pt);

                                        XplatUI.SendMessage(m.HWnd, Msg.WM_CONTEXTMENU, m.HWnd, (IntPtr)(pt.X + (pt.Y << 16)));

                                        me = new MouseEventArgs (FromParamToMouseButtons ((int) m.WParam.ToInt32()) | MouseButtons.Right, 
                                                mouse_clicks, 
                                                LowOrder ((int) m.LParam.ToInt32 ()), HighOrder ((int) m.LParam.ToInt32 ()), 
                                                0);

                                        HandleClick(mouse_clicks, me);
                                        OnMouseUp (me);

                                        if (InternalCapture) {
                                                InternalCapture = false;
                                        }

                                        if (mouse_clicks > 1) {
                                                mouse_clicks = 1;
                                        }
                                        return;
                                }
                                        
                                case Msg.WM_RBUTTONDOWN: {                                      
                                        InternalCapture = true;
                                        OnMouseDown (new MouseEventArgs (FromParamToMouseButtons ((int) m.WParam.ToInt32()), 
                                                mouse_clicks, LowOrder ((int) m.LParam.ToInt32 ()), HighOrder ((int) m.LParam.ToInt32 ()), 
                                                0));
                                        return;
                                }

                                case Msg.WM_RBUTTONDBLCLK: {
                                        InternalCapture = true;
                                        mouse_clicks++;
                                        OnMouseDown (new MouseEventArgs (FromParamToMouseButtons ((int) m.WParam.ToInt32()), 
                                                mouse_clicks, LowOrder ((int) m.LParam.ToInt32 ()), HighOrder ((int) m.LParam.ToInt32 ()), 
                                                0));
                                        return;
                                }

                                case Msg.WM_CONTEXTMENU: {
                                        if (context_menu != null) {
                                                Point   pt;

                                                pt = new Point(LowOrder ((int) m.LParam.ToInt32 ()), HighOrder ((int) m.LParam.ToInt32 ()));
                                                context_menu.Show(this, PointToClient(pt));
                                                return;
                                        }

                                        DefWndProc(ref m);
                                        return;
                                }

                                case Msg.WM_MOUSEWHEEL: {                               
                                        DefWndProc(ref m);
                                        OnMouseWheel (new MouseEventArgs (FromParamToMouseButtons ((int) m.WParam.ToInt32()), 
                                                mouse_clicks, LowOrder ((int) m.LParam.ToInt32 ()), HighOrder ((int) m.LParam.ToInt32 ()), 
                                                HighOrder(m.WParam.ToInt32())));
                                        return;
                                }

                                        
                                case Msg.WM_MOUSEMOVE: {                                        
                                        OnMouseMove  (new MouseEventArgs (FromParamToMouseButtons ((int) m.WParam.ToInt32()), 
                                                mouse_clicks, 
                                                LowOrder ((int) m.LParam.ToInt32 ()), HighOrder ((int) m.LParam.ToInt32 ()), 
                                                0));
                                        return;
                                }

                                case Msg.WM_MOUSE_ENTER: {
                                        if (is_entered) {
                                                return;
                                        }
                                        is_entered = true;
                                        OnMouseEnter(EventArgs.Empty);
                                        return;
                                }

                                case Msg.WM_MOUSE_LEAVE: {
                                        is_entered=false;
                                        OnMouseLeave(EventArgs.Empty);
                                        return;
                                }

                                case Msg.WM_MOUSEHOVER: {
                                        OnMouseHover(EventArgs.Empty);
                                        return;
                                }

                                case Msg.WM_SYSKEYUP: {
                                        if (ProcessKeyMessage(ref m)) {
                                                m.Result = IntPtr.Zero;
                                                return;
                                        }

                                        if ((m.WParam.ToInt32() & (int)Keys.KeyCode) == (int)Keys.Menu) {
                                                Form    form;

                                                form = FindForm();
                                                if (form != null && form.ActiveMenu != null) {
                                                        form.ActiveMenu.ProcessCmdKey(ref m, (Keys)m.WParam.ToInt32());
                                                }
                                        }

                                        DefWndProc (ref m);
                                        return;
                                }

                                case Msg.WM_SYSKEYDOWN:
                                case Msg.WM_KEYDOWN:
                                case Msg.WM_KEYUP:
                                case Msg.WM_SYSCHAR:
                                case Msg.WM_CHAR: {
                                        if (ProcessKeyMessage(ref m)) {
                                                m.Result = IntPtr.Zero;
                                                return;
                                        }
                                        DefWndProc (ref m);
                                        return;
                                }

                                case Msg.WM_HELP: {
                                        Point   mouse_pos;
                                        if (m.LParam != IntPtr.Zero) {
                                                HELPINFO        hi;

                                                hi = new HELPINFO();

                                                hi = (HELPINFO) Marshal.PtrToStructure (m.LParam, typeof (HELPINFO));
                                                mouse_pos = new Point(hi.MousePos.x, hi.MousePos.y);
                                        } else {
                                                mouse_pos = Control.MousePosition;
                                        }
                                        OnHelpRequested(new HelpEventArgs(mouse_pos));
                                        m.Result = (IntPtr)1;
                                        return;
                                }

                                case Msg.WM_KILLFOCUS: {
                                        this.has_focus = false;
                                        OnLostFocusInternal (EventArgs.Empty);
                                        return;
                                }

                                case Msg.WM_SETFOCUS: {
                                        if (!has_focus) {
                                                this.has_focus = true;
                                                OnGotFocusInternal (EventArgs.Empty);
                                        }
                                        return;
                                }
                                        

                                case Msg.WM_SYSCOLORCHANGE: {
                                        ThemeEngine.Current.ResetDefaults();
                                        OnSystemColorsChanged(EventArgs.Empty);
                                        return;
                                }
                                        

                                case Msg.WM_SETCURSOR: {
                                        if ((cursor == null) || ((HitTest)(m.LParam.ToInt32() & 0xffff) != HitTest.HTCLIENT)) {
                                                DefWndProc(ref m);
                                                return;
                                        }

                                        XplatUI.SetCursor(window.Handle, cursor.handle);
                                        m.Result = (IntPtr)1;

                                        return;
                                }

                                default: {
                                        DefWndProc(ref m);      
                                        return;
                                }
                        }
                }
                #endregion      // Public Instance Methods

                #region OnXXX methods
                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnBackColorChanged(EventArgs e) {
                        if (BackColorChanged!=null) BackColorChanged(this, e);
                        for (int i=0; i<child_controls.Count; i++) child_controls[i].OnParentBackColorChanged(e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnBackgroundImageChanged(EventArgs e) {
                        if (BackgroundImageChanged!=null) BackgroundImageChanged(this, e);
                        for (int i=0; i<child_controls.Count; i++) child_controls[i].OnParentBackgroundImageChanged(e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnBindingContextChanged(EventArgs e) {
                        CheckDataBindings ();
                        if (BindingContextChanged!=null) {
                                BindingContextChanged(this, e);
                        }
                        for (int i=0; i<child_controls.Count; i++) child_controls[i].OnParentBindingContextChanged(e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnCausesValidationChanged(EventArgs e) {
                        if (CausesValidationChanged!=null) CausesValidationChanged(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnChangeUICues(UICuesEventArgs e) {
                        if (ChangeUICues!=null) ChangeUICues(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnClick(EventArgs e) {
                        if (Click!=null) Click(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnContextMenuChanged(EventArgs e) {
                        if (ContextMenuChanged!=null) ContextMenuChanged(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnControlAdded(ControlEventArgs e) {
                        if (ControlAdded!=null) ControlAdded(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnControlRemoved(ControlEventArgs e) {
                        if (ControlRemoved!=null) ControlRemoved(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnCreateControl() {
                        // Override me!
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnCursorChanged(EventArgs e) {
                        if (CursorChanged!=null) CursorChanged(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnDockChanged(EventArgs e) {
                        if (DockChanged!=null) DockChanged(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnDoubleClick(EventArgs e) {
                        if (DoubleClick!=null) DoubleClick(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnDragDrop(DragEventArgs drgevent) {
                        if (DragDrop!=null) DragDrop(this, drgevent);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnDragEnter(DragEventArgs drgevent) {
                        if (DragEnter!=null) DragEnter(this, drgevent);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnDragLeave(EventArgs e) {
                        if (DragLeave!=null) DragLeave(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnDragOver(DragEventArgs drgevent) {
                        if (DragOver!=null) DragOver(this, drgevent);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnEnabledChanged(EventArgs e) {
                        if (IsHandleCreated) {
                                if (this is Form) {
                                        if (((Form)this).context == null) {
                                                XplatUI.EnableWindow(window.Handle, Enabled);
                                        }
                                } else {
                                        XplatUI.EnableWindow(window.Handle, Enabled);
                                }
                                Refresh();
                        }

                        if (EnabledChanged != null) {
                                EnabledChanged(this, e);
                        }

                        for (int i=0; i<child_controls.Count; i++) {
                                child_controls[i].OnParentEnabledChanged(e);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnEnter(EventArgs e) {
                        if (Enter!=null) Enter(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnFontChanged(EventArgs e) {
                        if (FontChanged!=null) FontChanged(this, e);
                        for (int i=0; i<child_controls.Count; i++) child_controls[i].OnParentFontChanged(e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnForeColorChanged(EventArgs e) {
                        if (ForeColorChanged!=null) ForeColorChanged(this, e);
                        for (int i=0; i<child_controls.Count; i++) child_controls[i].OnParentForeColorChanged(e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnGiveFeedback(GiveFeedbackEventArgs gfbevent) {
                        if (GiveFeedback!=null) GiveFeedback(this, gfbevent);
                }
                
                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnGotFocus(EventArgs e) {
                        if (GotFocus!=null) GotFocus(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnHandleCreated(EventArgs e) {
                        if (HandleCreated!=null) HandleCreated(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnHandleDestroyed(EventArgs e) {
                        if (HandleDestroyed!=null) HandleDestroyed(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnHelpRequested(HelpEventArgs hevent) {
                        if (HelpRequested!=null) HelpRequested(this, hevent);
                }

                protected virtual void OnImeModeChanged(EventArgs e) {
                        if (ImeModeChanged!=null) ImeModeChanged(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnInvalidated(InvalidateEventArgs e) {
                        if (ThemeEngine.Current.DoubleBufferingSupported)
                                if ((control_style & ControlStyles.DoubleBuffer) != 0) {
                                        // should this block be here?  seems like it
                                        // would be more at home in
                                        // NotifyInvalidated..
                                        if (e.InvalidRect == ClientRectangle) {
                                                ImageBufferNeedsRedraw ();
                                        }
                                        else {
                                                // we need this Inflate call here so
                                                // that the border of the rectangle is
                                                // considered Visible (the
                                                // invalid_region.IsVisible call) in
                                                // the WM_PAINT handling below.
                                                Rectangle r = Rectangle.Inflate(e.InvalidRect, 1,1);
                                                if (invalid_region == null)
                                                        invalid_region = new Region (r);
                                                else
                                                        invalid_region.Union (r);
                                        }
                                }
                        if (Invalidated!=null) Invalidated(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnKeyDown(KeyEventArgs e) {                      
                        if (KeyDown!=null) KeyDown(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnKeyPress(KeyPressEventArgs e) {
                        if (KeyPress!=null) KeyPress(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnKeyUp(KeyEventArgs e) {
                        if (KeyUp!=null) KeyUp(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnLayout(LayoutEventArgs levent) {
                        if (Layout!=null) Layout(this, levent);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnLeave(EventArgs e) {
                        if (Leave!=null) Leave(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnLocationChanged(EventArgs e) {
                        OnMove(e);
                        if (LocationChanged!=null) LocationChanged(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnLostFocus(EventArgs e) {
                        if (LostFocus!=null) LostFocus(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnMouseDown(MouseEventArgs e) {
                        if (MouseDown!=null) MouseDown(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnMouseEnter(EventArgs e) {
                        if (MouseEnter!=null) MouseEnter(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnMouseHover(EventArgs e) {
                        if (MouseHover!=null) MouseHover(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnMouseLeave(EventArgs e) {
                        if (MouseLeave!=null) MouseLeave(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnMouseMove(MouseEventArgs e) {                  
                        if (MouseMove!=null) MouseMove(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnMouseUp(MouseEventArgs e) {
                        if (MouseUp!=null) MouseUp(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnMouseWheel(MouseEventArgs e) {
                        if (MouseWheel!=null) MouseWheel(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnMove(EventArgs e) {
                        if (Move!=null) Move(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnNotifyMessage(Message m) {
                        // Override me!
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnPaint(PaintEventArgs e) {
                        if (Paint!=null) Paint(this, e);
                }

                internal virtual void OnPaintBackgroundInternal(PaintEventArgs e) {
                        // Override me
                }

                internal virtual void OnPaintInternal(PaintEventArgs e) {
                        // Override me
                }

                internal virtual void OnGotFocusInternal (EventArgs e)
                {
                        OnGotFocus (e);
                }

                internal virtual void OnLostFocusInternal (EventArgs e)
                {
                        OnLostFocus (e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnPaintBackground(PaintEventArgs pevent) {
                        PaintControlBackground (pevent);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnParentBackColorChanged(EventArgs e) {
                        if (background_color.IsEmpty && background_image==null) {
                                Invalidate();
                                OnBackColorChanged(e);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnParentBackgroundImageChanged(EventArgs e) {
                        if (background_color.IsEmpty && background_image==null) {
                                Invalidate();
                                OnBackgroundImageChanged(e);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnParentBindingContextChanged(EventArgs e) {
                        if (binding_context==null) {
                                binding_context=Parent.binding_context;
                                OnBindingContextChanged(e);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnParentChanged(EventArgs e) {
                        if (ParentChanged!=null) ParentChanged(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnParentEnabledChanged(EventArgs e) {
                        if (is_enabled) {
                                OnEnabledChanged(e);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnParentFontChanged(EventArgs e) {
                        if (font==null) {
                                Invalidate();
                                OnFontChanged(e);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnParentForeColorChanged(EventArgs e) {
                        if (foreground_color.IsEmpty) {
                                Invalidate();
                                OnForeColorChanged(e);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnParentRightToLeftChanged(EventArgs e) {
                        if (right_to_left==RightToLeft.Inherit) {
                                Invalidate();
                                OnRightToLeftChanged(e);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnParentVisibleChanged(EventArgs e) {
                        if (is_visible) {
                                OnVisibleChanged(e);
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnQueryContinueDrag(QueryContinueDragEventArgs e) {
                        if (QueryContinueDrag!=null) QueryContinueDrag(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnResize(EventArgs e) {
                        if (Resize!=null) Resize(this, e);

                        PerformLayout(this, "bounds");

                        if (parent != null) {
                                parent.PerformLayout();
                        }
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnRightToLeftChanged(EventArgs e) {
                        if (RightToLeftChanged!=null) RightToLeftChanged(this, e);
                        for (int i=0; i<child_controls.Count; i++) child_controls[i].OnParentRightToLeftChanged(e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnSizeChanged(EventArgs e) {
                        InvalidateBuffers ();
                        OnResize(e);
                        if (SizeChanged!=null) SizeChanged(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnStyleChanged(EventArgs e) {
                        if (StyleChanged!=null) StyleChanged(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnSystemColorsChanged(EventArgs e) {
                        if (SystemColorsChanged!=null) SystemColorsChanged(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnTabIndexChanged(EventArgs e) {
                        if (TabIndexChanged!=null) TabIndexChanged(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnTabStopChanged(EventArgs e) {
                        if (TabStopChanged!=null) TabStopChanged(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnTextChanged(EventArgs e) {
                        if (TextChanged!=null) TextChanged(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnValidated(EventArgs e) {
                        if (Validated!=null) Validated(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnValidating(System.ComponentModel.CancelEventArgs e) {
                        if (Validating!=null) Validating(this, e);
                }

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                protected virtual void OnVisibleChanged(EventArgs e) {
                        if ((parent != null) && !Created && Visible) {
                                if (!is_disposed) {
                                        CreateControl();
                                        PerformLayout();
                                }
                        }

                        if (VisibleChanged!=null) VisibleChanged(this, e);

                        // We need to tell our kids
                        for (int i=0; i<child_controls.Count; i++) {
                                if (child_controls[i].Visible) {
                                        child_controls[i].OnParentVisibleChanged(e);
                                }
                        }
                }
                #endregion      // OnXXX methods

                #region Events
                public event EventHandler               BackColorChanged;
                public event EventHandler               BackgroundImageChanged;
                public event EventHandler               BindingContextChanged;
                public event EventHandler               CausesValidationChanged;
                public event UICuesEventHandler         ChangeUICues;
                public event EventHandler               Click;
                public event EventHandler               ContextMenuChanged;

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                public event ControlEventHandler        ControlAdded;

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                public event ControlEventHandler        ControlRemoved;

                [MWFDescription("Fired when the cursor for the control has been changed"), MWFCategory("PropertyChanged")]
                public event EventHandler               CursorChanged;
                public event EventHandler               DockChanged;
                public event EventHandler               DoubleClick;
                public event DragEventHandler           DragDrop;
                public event DragEventHandler           DragEnter;
                public event EventHandler               DragLeave;
                public event DragEventHandler           DragOver;
                public event EventHandler               EnabledChanged;
                public event EventHandler               Enter;
                public event EventHandler               FontChanged;
                public event EventHandler               ForeColorChanged;
                public event GiveFeedbackEventHandler   GiveFeedback;

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                public event EventHandler               GotFocus;

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                public event EventHandler               HandleCreated;

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                public event EventHandler               HandleDestroyed;

                public event HelpEventHandler           HelpRequested;
                public event EventHandler               ImeModeChanged;

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                public event InvalidateEventHandler     Invalidated;

                public event KeyEventHandler            KeyDown;
                public event KeyPressEventHandler       KeyPress;
                public event KeyEventHandler            KeyUp;
                public event LayoutEventHandler         Layout;
                public event EventHandler               Leave;
                public event EventHandler               LocationChanged;

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                public event EventHandler               LostFocus;

                public event MouseEventHandler          MouseDown;
                public event EventHandler               MouseEnter;
                public event EventHandler               MouseHover;
                public event EventHandler               MouseLeave;
                public event MouseEventHandler          MouseMove;
                public event MouseEventHandler          MouseUp;

                [EditorBrowsable(EditorBrowsableState.Advanced)]
                [Browsable(false)]
                public event MouseEventHandler          MouseWheel;

                public event EventHandler               Move;
                public event PaintEventHandler          Paint;
                public event EventHandler               ParentChanged;
                public event QueryAccessibilityHelpEventHandler QueryAccessibilityHelp;
                public event QueryContinueDragEventHandler      QueryContinueDrag;
                public event EventHandler               Resize;
                public event EventHandler               RightToLeftChanged;
                public event EventHandler               SizeChanged;
                public event EventHandler               StyleChanged;
                public event EventHandler               SystemColorsChanged;
                public event EventHandler               TabIndexChanged;
                public event EventHandler               TabStopChanged;
                public event EventHandler               TextChanged;
                public event EventHandler               Validated;
                public event CancelEventHandler         Validating;
                public event EventHandler               VisibleChanged;
                #endregion      // Events
        }
}