Any sdk for instant messaging?

[HONOREDANCESTOR]

I have an idea for an application using instant messaging. But I
cannot find an SDK that will allow me to program new features for
Microsoft's instant messaging. Is there one out there?
Thanks.

 

[Jonathan Kay [MVP]]

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.