Code to display RTF files in Lisp?

[Ray Pelletier <rp23+@andrew.cmu.edu>]

Would anyone have any code which can parse and (perhaps) display
Rich Text Format(?) files in a window?

Thanks,
Ray Pelletier

ps..

or Teach Text files
or Normal format MSWord files
or any files created by some word processor X
   that have more than just text in them.