DCIOFFSCREEN structure
typedef struct {
DCISURFACEINFO
dciInfo;
// surface info
DCIRVAL (CALLBACK *Draw)
(LPVOID);
// Execute Draw Fn
DCIRVAL (CALLBACK *SetCliplist)
(LPVOID, LPRGNDATA);
// SetCliplist Fn
DCIRVAL (CALLBACK *SetDestination)
(LPVOID, LPRECT, LPRECT);
// SetDestination Fn
} DCIOFFSCREEN, FAR * LPDCIOFFSCREEN;