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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| No
| Import Library
| gdi32.lib
| Header File
| wingdi.h
| Unicode
| No
| Platform Notes
| Windows 95: Fails if the transform involves a shearing or rotation; int == 16
bits
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ExtCreateRegion
The ExtCreateRegion function creates a region from the specified region and transformation data.
HRGN ExtCreateRegion(
CONST XFORM *lpXform,
| // pointer to transformation data
| DWORD nCount,
| // size of structure containing region data
| CONST RGNDATA *lpRgnData
| // pointer to region data
| );
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Parameters
lpXform
Points to an XFORM structure that defines the transformation to be performed on the region. If
this pointer is NULL, the identity transformation is used.
nCount
Specifies the number of bytes pointed to by lpRgnData.
lpRgnData
Points to a RGNDATA structure that contains the region data.
Return Values
If the function succeeds, the return value is the value of the region.
If the function fails, the return value is NULL.
Remarks
An application can retrieve data for a region by calling the GetRegionData function.
Windows 95: Regions are no longer limited to the 64K heap.
Windows 95: World transforms that involve either shearing or rotations are not supported. ExtCreateRegion fails if the transformation matrix is anything other than a scaling or
translation of the region.
See Also
GetRegionData, RGNDATA, XFORM
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