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SetRectRgn info  Overview  Group

The SetRectRgn function changes a region into a rectangular region with the specified coordinates.

BOOL SetRectRgn(

    HRGN hrgn,

// handle of region

    int nLeftRect,

// x-coordinate of upper-left corner of rectangle

    int nTopRect,

// y-coordinate of upper-left corner of rectangle

    int nRightRect,

// x-coordinate of lower-right corner of rectangle

    int nBottomRect 

// y-coordinate of lower-right corner of rectangle

   );

Parameters

hrgn
Identifies the region.
nLeftRect
Specifies the x-coordinate of the upper-left corner of the rectangular region.
nTopRect
Specifies the y-coordinate of the upper-left corner of the rectangular region.
nRightRect
Specifies the x-coordinate of the lower-right corner of the rectangular region.
nBottomRect
Specifies the y-coordinate of the lower-right corner of the rectangular region.

Return Values

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.

Remarks

The region does not include the lower and right boundaries of the rectangle.

See Also

CreateRectRgn 

See also:


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