VMS Help System Services, $CLREF  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Clears (sets to 0) an event flag in a local or common event flag
    cluster.

    Format

      SYS$CLREF  efn

    C Prototype

      int sys$clref  (unsigned int efn);

  Additional Information (explode) :

• Argument