IntersectClipRect
The IntersectClipRect
function creates a new clipping region from the intersection of the current
clipping region and the specified rectangle.
int IntersectClipRect(
|
HDC hdc, |
// handle of 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
If the
function succeeds, the return value specifies the new clipping region s type
and 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 |
An error
occurred. (The current clipping region is unaffected.) |
Remarks
The lower and
rightmost edges of the given rectangle are excluded from the clipping region.
See Also