Region-rectangle structure.

typedef struct _RGNRECT {
  ULONG     ircStart;     /*  Rectangle number from which to start enumerating. */
  ULONG     crc;          /*  Number of rectangles that can be returned. */
  ULONG     crcReturned;  /*  Number of rectangles returned. */
  ULONG     ulDirection;  /*  Direction in which the returned rectangles are to be ordered. */
} RGNRECT;

typedef   RGNRECT   * PRGNRECT ;