Function name: CombineRgn

Defined in : GDI32

Requirements : Windows NT 3.1 or later; Windows 95 or later

Declaration:

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

Parameters:

* 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.

Returns:

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.

Related functions:

Examples:

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