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CombineRgn

The CombineRgn function combines two regions and stores the result in a third region. The two regions are combined according to the specified mode.

VB4-32,5,6
Declare Function CombineRgn Lib "gdi32" Alias "CombineRgn" (ByVal hDestRgn As Long, ByVal hSrcRgn1 As Long, ByVal hSrcRgn2 As Long, ByVal nCombineMode 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
hrgnDest
Identifies a new region with dimensions defined by combining two other regions. (This region must exist before CombineRgn is called.)

hrgnSrc1
Identifies the first of two regions to be combined.

hrgnSrc2
Identifies the second of two regions to be combined.

fnCombineMode
Specifies a mode indicating how the two regions will be combined. This parameter can be one of the following values:
RGN_AND
Creates the intersection of the two combined regions.
RGN_COPY
Creates a copy of the region identified by hrgnSrc1.
RGN_DIFF
Combines the parts of hrgnSrc1 that are not part of hrgnSrc2.
RGN_OR
Creates the union of two combined regions.
RGN_XOR
Creates the union of two combined regions except for any overlapping areas.

Return Values
The return value specifies the type of the resulting region. It can be one of the following values:
NULLREGION
The region is empty.

SIMPLEREGION
The region is a single rectangle.

COMPLEXREGION
The region is more than a single rectangle.

ERROR
No region is created.

Examples

Related Functions

VB.NET Example

 

 


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