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?