. . "Mar 16, 2005 Tags: .NET, Add-In, Add-In Options, Add-In Wizard, C#, Connect Class, Creating Add-In, DTE Object, Exec Event, IDE, OnConnection Method, OnDisconnection Method, QueryStatus Event, System.Exception, VS.NET, VsLangProj An add-in is a tool that you create programmatically by using objects, methods, properties, collections in .NET's extensibility model." . .