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:

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Notes:

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