RectInRegion info Overview Group

The RectInRegion function determines whether any part of the specified rectangle is within the boundaries of a region.

BOOL RectInRegion(

HRGN hrgn,

// handle of region

CONST RECT *lprc

// address of structure with rectangle

);

Parameters

hrgn: Identifies the region.
lprc: Points to a RECT structure containing the coordinates of the rectangle. The lower and right edges of the rectangle are not included.

If any part of the specified rectangle lies within the boundaries of the region, the return value is nonzero.

If no part of the specified rectangle lies within the boundaries of the region, the return value is zero.

HRGN hrgn,	// handle of region
CONST RECT *lprc	// address of structure with rectangle
);