See http://sbarnhill.mvps.org/WordFAQs/Overbar.htm. FWIW, note that there is
a roman numeral character set in the Unicode range 2160-2182, but they're
available only in "large" Unicode fonts such as Arial Unicode MS, and
they're pretty ugly and *don't* have bars top and bottom, either.
--
Suzanne S. Barnhill
Microsoft MVP (Word)
Words into Type
Fairhope, Alabama USA http://word.mvps.org