Outlook 2007 Macro Basic Code Needed

I have been trying for months, with no success, to program a macro that simply adds a line of text after my signiture when I press the reply, reply to all, forward, or new message buttons; or at least the new message button. The goal of this is to be able to insert witting jokes, quotes, etc at random after my signature line. I can handle the random part by coding agaist now() or time or whatever the current syntax is. I guess my quotes will reside internal to the macro to make things easier. I am unfamiliar with the outlook events; I don't have any more time I can spend on this, I just need help setting up the macro for these events, something like the following psydologic (in the outlook syntax) would be extremely useful.
IF event=reply, reply all, forward or new button press.
DO THIS IN THE MESSAGE WINDOW

DONE
HELP!!!!