I thought by publishing into Organizational Forms Library, I can easily
distribute these macros to the users. But after looking at your post, I'm bit
worried.

my intention is not to show the message's original contents if it qualifies
my criteria (as I described before). I've also modified OWA premium pages to
do the same thing. OWA part is prety much complete, but it appears that
without installing anything on client's machine, I wont be able to do the
same thing with Outlook.

If we forget the distribution difficulty for a minute and think this only
needs to work on a single Outlook instance, how can I capture the events and
call a macro? Can you show me an example of this?

Thanks
Duke