mcs/class/referencesource/System.Activities.Presentation/Microsoft.Tools.Common/Microsoft/Tools/Common/Win32Interop.cs

   1 //----------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 //----------------------------------------------------------------
   4
   5 namespace Microsoft.Tools.Common
   6 {
   7     using System;
   8     using System.Runtime.InteropServices;
   9     using System.Diagnostics.CodeAnalysis;
  10
  11
  12     internal static class Win32Interop
  13     {
  14         public const int WM_SETICON = 0x80;
  15         public const int WM_NCHITTEST = 0x84;
  16         public const int WM_SYSCOMMAND = 0x0112;
  17
  18         public const int GWL_STYLE = -16;
  19         public const int WS_MAXIMIZEBOX = 0x00010000;
  20         public const int WS_MINIMIZEBOX = 0x00020000;
  21         public const int WS_CLIPCHILDREN = 0x02000000;
  22         public const int WS_CLIPSIBLINGS = 0x04000000;
  23
  24         public const int GWL_EXSTYLE = -20;
  25         public const int WS_EX_DLGMODALFRAME = 0x00000001;
  26         public const int WS_EX_CONTEXTHELP = 0x00000400;
  27
  28         public const int SC_CONTEXTHELP = 0xf180;
  29
  30         public const int ICON_SMALL = 0;
  31         public const int ICON_BIG = 1;
  32
  33
  34         [SuppressMessage("Microsoft.Performance", "CA1812:AvoidUninstantiatedInternalClasses", Justification = "This class is shared by various projects and may not be used by a specific project")]
  35         [StructLayout(LayoutKind.Sequential)]
  36         public sealed class POINT
  37         {
  38             public int x;
  39             public int y;
  40
  41             public POINT()
  42             {
  43                 this.x = 0;
  44                 this.y = 0;
  45             }
  46
  47             public POINT(int x, int y)
  48             {
  49                 this.x = x;
  50                 this.y = y;
  51             }
  52         }
  53
  54         internal static void MakeWindowClipSiblingsAndChildren(HandleRef hwnd)
  55         {
  56             IntPtr windowStyle = Win32Interop.GetWindowLongPtr(hwnd.Handle, Win32Interop.GWL_STYLE);
  57             if (IntPtr.Size == 4)
  58             {
  59                 windowStyle = new IntPtr(windowStyle.ToInt32() | Win32Interop.WS_CLIPSIBLINGS | Win32Interop.WS_CLIPCHILDREN);
  60             }
  61             else
  62             {
  63                 windowStyle = new IntPtr(windowStyle.ToInt64() | ((long)Win32Interop.WS_CLIPSIBLINGS) | ((long)Win32Interop.WS_CLIPCHILDREN));
  64             }
  65             Win32Interop.SetWindowLongPtr(hwnd, Win32Interop.GWL_STYLE, (IntPtr)windowStyle);
  66         }
  67
  68         // This static method is required because legacy OSes do not support
  69         // SetWindowLongPtr
  70         internal static IntPtr SetWindowLongPtr(HandleRef hWnd, int nIndex, IntPtr dwNewLong)
  71         {
  72             if (IntPtr.Size == 8)
  73                 return SetWindowLongPtr64(hWnd, nIndex, dwNewLong);
  74             else
  75                 return new IntPtr(SetWindowLong32(hWnd, nIndex, dwNewLong.ToInt32()));
  76         }
  77
  78
  79         // This static method is required because Win32 does not support
  80         // GetWindowLongPtr directly
  81         public static IntPtr GetWindowLongPtr(IntPtr hWnd, int nIndex)
  82         {
  83             if (IntPtr.Size == 8)
  84                 return GetWindowLongPtr64(hWnd, nIndex);
  85             else
  86                 return GetWindowLongPtr32(hWnd, nIndex);
  87         }
  88
  89         [DllImport("user32.dll", EntryPoint = "SetWindowLong")]
  90         private static extern int SetWindowLong32(HandleRef hWnd, int nIndex, int dwNewLong);
  91
  92         [DllImport("user32.dll", EntryPoint = "SetWindowLongPtr")]
  93         private static extern IntPtr SetWindowLongPtr64(HandleRef hWnd, int nIndex, IntPtr dwNewLong);
  94
  95         [SuppressMessage("Microsoft.Portability", "CA1901:PInvokeDeclarationsShouldBePortable", MessageId = "return", Justification = "Calling code is expected to handle the different size of IntPtr")]
  96         [DllImport("user32.dll", EntryPoint = "GetWindowLong")]
  97         private static extern IntPtr GetWindowLongPtr32(IntPtr hWnd, int nIndex);
  98
  99         [DllImport("user32.dll", EntryPoint = "GetWindowLongPtr")]
 100         private static extern IntPtr GetWindowLongPtr64(IntPtr hWnd, int nIndex);
 101
 102         [SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode", Justification = "This function is shared by various projects and may not be used by a specific project")]
 103         [DllImport("user32.dll")]
 104         public static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);
 105
 106         [SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode", Justification = "This function is shared by various projects and may not be used by a specific project")]
 107         [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
 108         public static extern IntPtr GetActiveWindow();
 109
 110         [SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode", Justification = "This function is shared by various projects and may not be used by a specific project")]
 111         [System.Runtime.InteropServices.DllImport("gdi32.dll")]
 112         public static extern bool DeleteObject(IntPtr hObject);
 113
 114         [SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode", Justification = "This function is shared by various projects and may not be used by a specific project")]
 115         [DllImport("User32", EntryPoint = "ScreenToClient", SetLastError = true, ExactSpelling = true, CharSet = CharSet.Auto)]
 116         public static extern int ScreenToClient(IntPtr hWnd, [In, Out] POINT pt);
 117     }
 118 }