OpenVMS usage:longword_signed
    type:         longword (signed)
    access:       write only
    mechanism:    by value

    The values returned by STR$CASE_BLIND_COMPARE and the conditions
    to which they translate are as follows:

    Returned
    Value         Condition

                  first-source-string is less than second-source-
                  string.
    0             Both are the same (with blank fill for shorter
                  string).
    1             first-source-string is greater than second-source-
                  string.