VMS Help Lexicals, F$GETQUI, Return Value  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Either an integer or a character string, depending on the item
    you request. For items that return a Boolean value, the string
    is TRUE or FALSE. If the $GETQUI system service returns an error
    code, F$GETQUI returns a null string ("").