OE (unlike Outlook) does not have add-ins or plugins.
Whatever is on the market is done using low level Windows hooks.

Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool

"msnews.microsoft.com" wrote in message
...
i need to write two outlook COM add-ins .. plugins, whatever you call them.
One for Outlook Express and the other for Outlook 2003. Could somebody
please point me to some docs that describes add-in development in C++ for
each client - especially Outlook Express .. can't seem to find anything.

book recommendations would also be very welcome.

TIA