VMS Help RTL Routines, STR$, STR$MATCH_WILD, Arguments  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 candidate-string

    OpenVMS usage:char_string
    type:         character string
    access:       read only
    mechanism:    by descriptor

    String that is compared to the pattern string. The candidate-
    string argument is the address of a descriptor pointing to the
    candidate string.

 pattern-string

    OpenVMS usage:char_string
    type:         character string
    access:       read only
    mechanism:    by descriptor

    String containing wildcard characters. The pattern-string
    argument is the address of a descriptor pointing to the pattern
    string. The wildcards in the pattern string are translated when
    STR$MATCH_WILD searches the candidate string to determine if it
    matches the pattern string.