VMS Help RTL Routines, STR$, STR$COPY_R_64, Arguments  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 destination-string

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

    Destination string into which STR$COPY_R_64 copies the source
    string. The destination-string argument is the address of a
    descriptor pointing to the destination string.

    The class field determines the appropriate action.

    See the description of LIB$ANALYZE_SDESC for restrictions
    associated with specific descriptor classes.

 quad-integer-source-length

    OpenVMS usage:quadword_unsigned
    type:         quadword (unsigned)
    access:       read only
    mechanism:    by reference

    Length of the source string. The quad-integer-source-length
    argument is the address of an unsigned quadword containing the
    length of the source string.

 source-string-address

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

    Source string that STR$COPY_R_64 copies into the destination
    string. The source-string-address argument is the address of the
    source string.