The threshold data structure.

typedef struct _THRESHOLD {
  USHORT     Length;    /*  Length field. */
  USHORT     Level1;    /*  First movement level. */
  USHORT     Lev1Mult;  /*  First-level multiplier. */
  USHORT     Level2;    /*  Second movement level. */
  USHORT     Lev2Mult;  /*  Second-level multiplier. */
} THRESHOLD;

typedef   THRESHOLD   * PTHRESHOLD ;