Declare Function IsWindow Lib "user32.dll" (ByVal hWnd As Long) As Long
IsWindow determines if a given handle refers to a window or not. The function verifies that the handle in fact refers to a window, instead of one of the many other objects which handles can represent.
If the handle does not refer to a window, the function returns 0. If the handle does refer to a window, the function returns a non-zero value.
None.
' This code is licensed according to the terms and conditions listed here. ' Demonstrate handles refering to a window and not refering to a window. Dim hWindow As Long ' handle to a window (Form1, to be exact) Dim hPen As Long ' handle to a pen (the solid black stock pen) Dim result As Long ' result of the test ' Initialize the two handles. hWindow = Form1.hWnd ' hWindow now equals window Form1's handle hPen = GetStockObject(BLACK_PEN) ' hPen refers to a pen ' Verify that hWindow refers to a window. result = IsWindow(hWindow) If result = 0 Then Debug.Print "hWindow does not refer to a window." ' won't happen Else Debug.Print "hWindow refers to a window." ' will happen End If ' Verify that hPen does not refer to a window. result = IsWindow(hPen) If result = 0 Then Debug.Print "hPen does not refer to a window." ' will happen Else Debug.Print "hPen refers to a window." ' won't happen End If
IsChild
Windows
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Last Modified: August 1, 1999
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