Microsoft itself provides some tools to extend the functionality of MS applications especially for office.
If u can get Visual Studio Tools For Office u can get.
For more information search in http://msdn.microsoft.com
It requires Office 2003 with SP,VSTO,.NET 2005.
: hi..everyone...I just wanted to know how can we make plug-ins for various MS applications such as word,media player,internet explorer..using VB.NET...