VMS Help CC, Language topics, Builtin Functions, Insert Entry in Queue  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  The _INSQUE function inserts a new entry into a queue following an
  existing entry.

  Syntax:

       typedef enum {_insque_inserted_only, _insque_inserted_many}
                     _INSQUE_STATUS;

       _INSQUE_STATUS _INSQUE(void *__new_entry, void
                              *__predecessor);