Microsoft Foundation Classes (mfc.hlp) (
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SubtractRect
◄CRect► ◄Up► ◄Contents► ◄Index► ◄Back►
──Microsoft Foundation Classes──────────────────────────────────────────────
Windows 3.1 only
BOOL SubtractRect( LPRECT lpRectSrc1, LPRECT lpRectSrc2 );
Parameter Description
<lpRectSrc1> Points to the RECT structure from which a rectangle is to
be subtracted.
<lpRectSrc2> Points to the RECT structure that is to be subtracted from
the rectangle pointed to by <lpRectSrc1>.
Remarks
Makes the dimensions of a CRect object equal to the subtraction of
<lpRectSrc2> from <lpRectSrc1>.
The rectangle specified by <lpRectSrc2> is subtracted from the rectangle
specified by <lpRectSrc1> only when the rectangles intersect completely
in either the x- or y-direction.
For example, if <lpRectSrc1> were (10,10, 100,100) and <lpRectSrc2> were
(50,50, 150,150), the rectangle pointed to by <lpRectSrc1> would contain
the same coordinates as the original <lpRectSrc1> when the function
returned. If <lpRectSrc1> were (10,10, 100,100) and <lpRectSrc2> were
(50,10, 150,150), however, the rectangle pointed to by <lpRectSrc1>
would contain the coordinates (10,10, 50,100) when the function
returned.
Return Value
Nonzero if the function is successful; otherwise, 0.
See Also
◄CRect::IntersectRect►, ◄::UnionRect►, ◄::SubtractRect►
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