Removes one or more notification requests previously established
    by a call to SYS$SETCLUEVT.

    Format

      SYS$CLRCLUEVT  [handle] ,[acmode] ,[event]

    C Prototype

      int sys$clrcluevt  (struct _cluevthndl *handle, unsigned int

                         acmode, unsigned int event);

  Additional Information (explode) :

• Arguments