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SubtractRect info  Overview  Group

The SubtractRect function obtains the coordinates of a rectangle determined by subtracting one rectangle from another.

BOOL SubtractRect(

    LPRECT lprcDst,

// pointer to destination rectangle

    CONST RECT *lprcSrc1,

// pointer to rectangle to subtract from

    CONST RECT *lprcSrc2 

// pointer to rectangle to subtract

   );

Parameters

lprcDst
Points to a RECT structure that receives the coordinates of the rectangle determined by subtracting the rectangle pointed to by lprcSrc2 from the rectangle pointed to by lprcSrc1.
lprcSrc1
Points to a RECT structure from which the function subtracts the rectangle pointed to by lprcSrc2.
lprcSrc2
Points to a RECT structure that the function subtracts from the rectangle pointed to by lprcSrc1.

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 function only subtracts the rectangle specified by lprcSrc2 from the rectangle specified by lprcSrc1 when the rectangles intersect completely in either the x- or y-direction. For example, if *lprcSrc1 has the coordinates (10,10,100,100) and *lprcSrc2 has the coordinates (50,50,150,150), the function sets the coordinates of the rectangle pointed to by lprcDst to (10,10,100,100). If *lprcSrc1 has the coordinates (10,10,100,100) and *lprcSrc2 has the coordinates (50,10,150,150), however, the function sets the coordinates of the rectangle pointed to by lprcDst to (10,10,50,100).

See Also

IntersectRect, RECT, UnionRect 

file: /Techref/os/win/api/win32/func/src/f87_10.htm, 3KB, , updated: 2000/4/7 12:19, local time: 2024/4/26 05:58,
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