This function retrieves the update region of a window by copying it into the specified region. The coordinates of the update region are relative to the upper left corner of the window; that is, they are client coordinates.
C# Signature:
[DllImport("user32.dll")]
static extern int GetUpdateRgn(IntPtr hWnd, IntPtr hRgn, bool bErase);
User-Defined Types:
None.
Notes:
None.
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Sample Code:
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Alternative Managed API:
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