Defines the dimensions of a box.

typedef struct _BOXDATA {
  POINTL     ptlOpposite;  /*  Defines opposite corner of the box. */
  LONG       IHRound;      /*  Horizontal length of the full axis of an ellipse. */
  LONG       IVRound;      /*  Vertical length of the full axis of an ellipse. */
} BOXDATA;

typedef   BOXDATA   * PBOXDATA ;