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CreatePolygonRgn

The CreatePolygonRgn function creates a polygonal region.

VB4-32,5,6
Declare Function CreatePolygonRgn Lib "gdi32" Alias "CreatePolygonRgn" (lpPoint As POINTAPI, ByVal nCount As Long, ByVal nPolyFillMode As Long) As Long

VB.NET
System.Drawing.Region

Operating Systems Supported
Requires Windows NT 3.1 or later; Requires Windows 95 or later

Library
Gdi32

Parameter Information
- 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:
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).

Return Values
If the function succeeds, the return value is the handle to the region.

If the function fails, the return value is NULL.

Last update: 07 April 2006