This structure contains fields for the SHC_ENABLE_EVENT message.
typedef struct _PARM_ENEVENT {
  ULONG      ulFunction;  /*  Handler command function. */
  HID        hid;         /*  Handler ID. */
  HEVENT     hevent;      /*  Handle of events to enable. */
  PEVCB      pevcbUser;   /*  User event information. */
} PARM_ENEVENT;
typedef   PARM _ ENEVENT   FAR   * PPARM _ ENEVENT ;