Code Template Add-In for Visual Studio.NET
http://www.codeproject.com/useritems/CodeTemplateNET.aspChanging the Visual Studio .NET Add-in Default Tool Menu Item Icon
http://www.codeproject.com/dotnet/vsnet_addin_icon_change.aspVS.NET MSN Messenger Add-In
http://www.codeproject.com/dotnet/msgaddin.asp网上其它的地方也不少，用www.google.com search一下，关键字用vs.net add-in就可以。
http://www.codeproject.com/useritems/CodeTemplateNET.aspChanging the Visual Studio .NET Add-in Default Tool Menu Item Icon
http://www.codeproject.com/dotnet/vsnet_addin_icon_change.aspVS.NET MSN Messenger Add-In
http://www.codeproject.com/dotnet/msgaddin.asp网上其它的地方也不少，用www.google.com search一下，关键字用vs.net add-in就可以。
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnvssamp/html/vbcs_CreateaVSNETAdd-In.asp