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SetWindowRgn The SetWindowRgn function sets the window region of a window. The window region determines the area within the window where the operating system permits drawing. The operating system does not display any portion of a window that lies outside of the window region.
VB4-32,5,6
Declare Function SetWindowRgn Lib "user32" Alias "SetWindowRgn" (ByVal hWnd As Long, ByVal hRgn As Long, ByVal bRedraw As Boolean) As Long |
VB.NET
System.Windows.Forms.Region |
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Operating Systems Supported |
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Requires Windows NT 3.5(1) or later; Requires Windows 95 or later |
- hWnd
Handle to the window whose window region is to be set.
- hRgn
Handle to a region. The function sets the window region of the window to this region.
If hRgn is NULL, the function sets the window region to NULL.
- bRedraw
Boolean value that specifies whether the operating system redraws the window after setting the window region. If bRedraw is TRUE, the operating system does so; otherwise, it does not.
Typically, you set bRedraw to TRUE if the window is visible. |
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError. |
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