what are you trying to achieve?

since there's not a lot of information how you might attempt this with perl have a look at how Mark Hammond wrote some Outlook plugin code (using windows extensions - win 32 com) for spambayes using *shhh*python*shhh*. Not in Perl but you can at least see how it can be done using COM.

try the CPAN win32 category for suitable modules

google returns some interesting examples... but nothing conclusive.