Thank you AmigaMance and for your responses.
As buzz says, it would not be very difficult to build an application capable of analyse a text file and determine if it is Unicode (Little or Big Endian, depending on the 16#w#fffe or feff header), UTF-x or just ANSI text. After that it should look up for the correct glyph within a full Unicode font (Arial Unicode, for example) and render it inside a window...
TTEngine should be capable of doing this job. It worths a look at its documentation.

Cheers
zurt