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
);
If the function succeeds, the return value is the value of the region.
If the function fails, the return value is NULL.
Windows NT: To get extended error information, call GetLastError.
An application can retrieve data for a region by calling the GetRegionData function.
Windows 95 and Windows 98: Regions are no longer limited to the 64K heap.
Windows 95 and Windows 98: 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.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in wingdi.h.
Import Library: Use gdi32.lib.
Regions Overview, Region Functions, GetRegionData, RGNDATA, XFORM