http://blogs.msdn.com/jackg/archive/2005/10/05/477458.aspxAs I mentioned in a previous post, the Managed Add-in Framework (System.AddIn NS) was announced at PDC 2005. The WinFX <Windows VISTA Developer reference> namespace high resolution poster can be found on the WinFX web site .en-USCommunityServer 2.1 SP1 (Build: 61025.2)