This structure contains fields for the SMH_REPORTEVENT message.
typedef struct _PARM_EVENT {
  ULONG      ulFunction;  /*  SMH command function. */
  HID        hid;         /*  Handler ID. */
  HEVENT     hevent;      /*  Explicit events only. */
  PEVCB      pevcbEvent;  /*  Event status and HSTREAM. */
} PARM_EVENT;
typedef   PARM _ EVENT   FAR   * PPARM _ EVENT ;