BOOL UnionRect( LPCRECT lpRect1, LPCRECT lpRect2 );
Return Value
Nonzero if the union is not empty; 0 if the union is empty.
Parameters
lpRect1
Points to a RECT or CRect that contains a source rectangle.
lpRect2
Points to a RECT or CRect that contains a source rectangle.
Remarks
Makes the dimensions of CRect equal to the union of the two source rectangles. The union is the smallest rectangle that contains both source rectangles.
Windows ignores the dimensions of an empty rectangle; that is, a rectangle that has no height or has no width.
Note Both of the rectangles must be normalized or this function may fail. You can call NormalizeRect to normalize the rectangles before calling this function.
Example
CRect rect1(100, 0, 200, 300);
CRect rect2( 0, 100, 300, 200);
CRect rect3;
rect3.UnionRect(&rect1, &rect2);
CRect rectResult(0, 0, 300, 300);
ASSERT(rectResult == rect3);
CRect Overview | Class Members | Hierarchy Chart
See Also CRect::operator |=, CRect::operator |, CRect::IntersectRect, CRect::SubtractRect, CRect::NormalizeRect, ::UnionRect