outlook addin possibility

I'm wondering about the possibility of a project I've been thinking about. I want to make an addin for Outlook. At the click of a button, I want an email to be "cleaned" for forwarding. In other words, I'd remove any spaces longer than 2 nbsp, remove line spacing greater than say 2, remove any ">" characters, and do some other general formatting like removing long lists of email addresses.

I know how to do all the formatting stuff, but I'm wondering about the ease of making an addon to Outlook!? If it cannot be created as an Outlook addin, I guess I'll just have to make it as a seperate app.

Thoughts?