The SetRectRgn function changes a region into a rectangular region with the specified coordinates.
BOOL SetRectRgn(
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HRGN hrgn, |
// handle of region |
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int nLeftRect, |
// x-coordinate of upper-left corner of rectangle |
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int nTopRect, |
// y-coordinate of upper-left corner of rectangle |
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int nRightRect, |
// x-coordinate of lower-right corner of rectangle |
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int nBottomRect |
// y-coordinate of lower-right corner of rectangle |
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); |
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.
The region does not include the lower and right boundaries of the rectangle.