What does the variable bRedraw in the SetWindowRgn(hWnd: HWND; hRgn: HRGN; bRedraw: Boolean); function SetWindowRgn(hWnd: HWND; hRgn: HRGN; bRedraw: Boolean);

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     int SetWindowRgn( HWND hWnd, // handle to window whose window region is to be set HRGN hRgn, // handle to region BOOL bRedraw // window redraw flag );

    Parameters

    hWnd

    This is a region to be set.

    hRgn

    Handle to a region. This function sets the window region to this region. If hRgn is NULL, the function sets the window region to NULL.

    bRedraw Boolean value that specifies whether it is 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.

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