Rectangle structure.

typedef struct _RECTL {
  LONG     xLeft;    /*  X-coordinate of left-hand edge of rectangle. */
  LONG     yBottom;  /*  Y-coordinate of bottom edge of rectangle. */
  LONG     xRight;   /*  X-coordinate of right-hand edge of rectangle. */
  LONG     yTop;     /*  Y-coordinate of top edge of rectangle. */
} RECTL;

typedef   RECTL   * PRECTL ;