CreatePolygonRgn
The CreatePolygonRgn
function creates a polygonal region.
HRGN CreatePolygonRgn(
|
CONST POINT *lppt, |
// pointer to array
of points |
|
int cPoints, |
// number of points
in array |
|
int fnPolyFillMode |
// polygon-filling
mode |
|
); |
|
Parameters
lppt
Points to an
array of POINT
structures that define the vertices of the polygon. The polygon is presumed
closed. Each vertex can be specified only once.
cPoints
Specifies the
number of points in the array.
fnPolyFillMode
Specifies the
fill mode used to determine which pixels are in the region. This parameter can
be one of the following values:
|
Value |
Meaning |
|
ALTERNATE |
Selects
alternate mode (fills area between odd-numbered and even-numbered polygon
sides on each scan line). |
|
WINDING |
Selects
winding mode (fills any region with a nonzero winding value). |
For more
information about these modes, see the SetPolyFillMode function.
Return Values
If the
function succeeds, the return value is the handle to the region.
If the
function fails, the return value is NULL.
See Also