[Outlook] Insert Text At Start of Every Paragraph

I have a probably unique situation. I want to write something that automatically runs in Outlook such that whenever I write an e-mail (either by hitting on the New Message button, or replying, or whatever) every paragraph I write starts with a static block of text. So, I need something that at the start of every paragraph (which I assume is just any line break followed by characters, because I don't need this text to show on blank lines), the word "PRIVATE" appears.

Ideally, I'd want this to happen dynamically. I.E. when the user is writing an e-mail, he/she hits enter twice to start a new paragraph and when he/she hits the first keystroke of the paragraph (say "A" for example), he gets "PRIVATE A".

Can this be done? Any advice, instruction, guidance, or links as to how?

Look up Visual Tools for Office

Have a look into Creating AddIns for outlook