typedef struct _RGNDATA { /* rgnd */
RGNDATAHEADER rdh;
char Buffer[1];
} RGNDATA, *PRGNDATA, NEAR *NPRGNDATA, FAR *LPRGNDATA;
The RGNDATA structure contains the data returned by the GetRegionData function and is sent to the ExtCreateRegion function. This data is a list of rectangles that matches the shape of the region. Rectangles are sorted top to bottom, left to right. They do not overlap.
rdh
Specifies a RGNDATAHEADER structure that describes the data list.
Buffer
Specifies an arbitrary sized buffer containing the list of data that describes the region.
RGNDATAHEADER