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ExcludeClipRect      Create New Clipping Area

short ExcludeClipRect(hDC, RcUlX, RcUlY, RcLrX, RcLrY)
HDC hDC;
short RcUlX; /* rectangle upper left X coordinate */
short RcUlY; /* rectangle upper left Y coordinate */
short RcLrX; /* rectangle lower right X coordinate */
short RcLrY; /* rectangle lower right Y coordinate */

Returns:

                return value
        |-------------------------------------|
        |COMPLEXREGION Overlapping borders    |
        |ERROR         Invalid DC             |
        |NULLREGION    Empty clipping area    |
        |SIMPLEREGION  No overlapping borders |
        +-------------------------------------+


Note:       RcLrX - RcUlX and RcLrY - RcUlY must be less than
                32,767