VMS Help RTL Routines, STR$, STR$GET1_DX_64, Arguments  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 quad-integer-length

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

    Number of bytes that STR$GET1_DX_64 allocates. The quad-integer-
    length argument is the address of an unsigned quadword containing
    this number.

 character-string

    OpenVMS usage:char_string
    type:         character string
    access:       modify
    mechanism:    by descriptor

    Dynamic string descriptor to which STR$GET1_DX_64 allocates
    the area. The character-string argument is the address of the
    descriptor. The descriptor's CLASS field is checked.