fixed-or-dynamic-input-string

    OpenVMS usage:char_string
    type:         character string
    access:       read only
    mechanism:    by descriptor, fixed-length or dynamic string

    Input string containing the string representation of an unsigned
    hexadecimal value that OTS$CVT_TZ_L converts to an unsigned
    integer. The fixed-or-dynamic-input-string argument is the
    address of a descriptor pointing to the input string. The valid
    input characters are blanks, the digits 0 through 7, and the
    letters A through F. Letters can be uppercase or lowercase. No
    sign is permitted.

 varying-output-value

    OpenVMS usage:varying_arg
    type:         unspecified
    access:       write only
    mechanism:    by reference

    Unsigned integer of specified size that OTS$CVT_TZ_L creates
    when it converts the ASCII text string. The varying-output-value
    argument is the address of the unsigned integer. The value of the
    output-value-size argument determines the size in bytes of the
    output value.

 output-value-size

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

    Arbitrary number of bytes to be occupied by the unsigned integer
    output value. The output-value-size argument contains a value
    that equals the size in bytes of the output value. If the value
    of output-value-size is zero or a negative number, OTS$CVT_TZ_L
    returns an input conversion error. If you omit the output-value-
    size argument, the default is 4 (longword).

 flags-value

    OpenVMS usage:mask_longword
    type:         longword (unsigned)
    access:       read only
    mechanism:    by value

    User-supplied flags that OTS$CVT_TZ_L uses to determine how
    to interpret blanks within the input string. The flags-value
    argument contains these user-supplied flags as described in the
    following table:

    Bit  Action if Set    Action if Clear

    0    Ignore all       Interpret blanks as zeros.
         blanks.

    If you omit the flags-value argument, OTS$CVT_TZ_L defaults the
    flag to clear.