VMS Help CC, Run-time functions, catgets  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Retrieves a message from a message catalog.

  The message identified by set_id and msg_id, in the message catalog
  catd, is retrieved The message is stored in a message buffer in the
  nl_catd structure which is overwritten by subsequent calls to
  catgets.  If a message string needs to be preserved, it should be
  copied to another location by the program.

  Syntax:

       #include <nl_types.h>

       char *catgets (nl_catd catd, int set_id, int msg_id, const
       char *s);