Imports System Imports Microsoft.VisualBasic Module ConversionsA Sub f1(ByRef a As Object) End Sub Sub f2(ByVal array() As Object, ByVal index As Integer, ByVal count As Integer, ByVal value As Object) Dim i As Integer For i = index To (index + count) - 1 array(i) = value Next i End Sub Sub Main() On Error GoTo ErrorHandler Dim a(10) As Object Dim b() As Object = New String(10) {} f1(a(0)) f1(b(1)) ' ArrayTypeMismatchException Dim str(100) As String f2(str, 0, 101, "Undefined") f2(str, 0, 10, Nothing) f2(str, 91, 10, 0) ' ArrayTypeMismatchException Exit Sub ErrorHandler: If Err.Number <> 5 Then ' System.ArrayTypeMismatchException Throw New Exception("#CA1 - Conversion Statement failed") End If Resume Next End Sub End Module