ExcludeClipRect info  Overview  Group

The ExcludeClipRect function creates a new clipping region that consists of the existing clipping region minus the specified rectangle.

int ExcludeClipRect(

HDC hdc,	// handle to device context
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

hdc

Identifies the device context.

nLeftRect

Specifies the logical x-coordinate of the upper-left corner of the rectangle.

nTopRect

Specifies the logical y-coordinate of the upper-left corner of the rectangle.

nRightRect

Specifies the logical x-coordinate of the lower-right corner of the rectangle.

nBottomRect

Specifies the logical y-coordinate of the lower-right corner of the rectangle.

Return Values

The return value specifies the new clipping region’s complexity; it can be any one of the following values:

Value	Meaning
NULLREGION	Region is empty.
SIMPLEREGION	Region is a single rectangle.
COMPLEXREGION	Region is more than one rectangle.
ERROR	No region was created.

Remarks

The lower and right edges of the specified rectangle are not excluded from the clipping region.

See Also

IntersectClipRect