user-context
    OpenVMS usage:context
    type:         longword (unsigned)
    access:       modify
    mechanism:    by reference
    User context that retains the translation context over multiple
    calls to this routine. The user-context argument is the address
    of an unsigned longword that contains this context. The initial
    value of the context variable must be zero. Thereafter, the user
    program must not write to the cell.
 component
    OpenVMS usage:longword_signed
    type:         longword (signed)
    access:       read only
    mechanism:    by reference
    The component of the context that is being initialized. The
    component argument is the address of a signed longword that
    indicates this component. Only one component can be initialized
    per call to LIB$INIT_DATE_TIME; these component codes are shown
    in the following list.
    o  LIB$K_MONTH_NAME
    o  LIB$K_MONTH_NAME_ABB
    o  LIB$K_FORMAT_MNEMONICS
    o  LIB$K_WEEKDAY_NAME
    o  LIB$K_WEEKDAY_NAME_ABB
    o  LIB$K_RELATIVE_DAY_NAME
    o  LIB$K_MERIDIEM_INDICATOR
    o  LIB$K_OUTPUT_FORMAT
    o  LIB$K_INPUT_FORMAT
    o  LIB$K_LANGUAGE
 init-string
    OpenVMS usage:char_string
    type:         character string
    access:       read only
    mechanism:    by descriptor
    The characters that are to be used in formatting dates and times
    for input or output. The init-string argument is the address of a
    descriptor pointing to this string.