VMS Help  —  RTL Routines, LIB$  LIB$LEN  Argument
 source-string

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

    Source string whose length is returned by LIB$LEN. The source-
    string argument contains the address of a descriptor pointing to
    this source string.
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