/sys$common/syshlp/helplib.hlb LGI Routines, LGI$ICB_USERPROMPT, Description  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Use this callback routine to interactively prompt for the user
    name on a character-cell terminal. The callback routine reads
    the response to the prompt and does standard DCL parsing for the
    user name and any qualifiers provided. Upon completion of this
    routine, the user name is accessible at the LGI$A_USERNAME entry
    in the standard arguments vector.