OutLook

What code do you have so far?

I have no direct experience doing what you describe,
but it sounds like you need to do more than just Replace.

You probably also need to add Tags like "(url)" and "(/url)",
or something along those lines.

Note that you would actually use "[" instead of "(", but to prevent
the editor here from thinking it was a link, I had to use "(" for
illustrative purposes.

Spoo