Greetings,
Sort of. There's an old Windows Messenger API (with sketchy documentation), an unofficial
MSN Messenger API (which builds on the Windows Messenger one and is not "officially"
documented), a Windows Messenger Add-On framework (which longer is valid since Add-on support
was removed), the MSN Messenger/Windows Messenger Activities API and the Windows Live
Messenger managed add-ins support.
The last two can be found here:
http://dev.live.com/messenger/sdks.aspx
--
Jonathan Kay
Microsoft MVP - Windows Messenger/MSN Messenger/Windows Live Messenger
Associate Expert
http://www.microsoft.com/windowsxp/expertzone/
Messenger Resources -
http://messenger.jonathankay.com
All posts unless otherwise specified are (c) 2006 Jonathan Kay.
You *must* contact me for redistribution rights.