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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 regionís 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 

See also:


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