Scroll-bar control data structure.

typedef struct _SBCDATA {
  USHORT     cb;        /*  Length of control data in bytes. */
  USHORT     sHilite;   /*  Highlighting code. */
  SHORT      posFirst;  /*  First bound of the scroll-bar range. */
  SHORT      posLast;   /*  Last bound of the scroll-bar range. */
  SHORT      posThumb;  /*  Slider position. */
  SHORT      cVisible;  /*  Number of data items visible. */
  SHORT      cTotal;    /*  Number of data items available. */
} SBCDATA;

typedef   SBCDATA   * PSBCDATA ;