In previous version of VS, if you want to create a ToolWindow hosting a .NET user control by using Windows.CreateToolWindow , you'll have to use a shim control to support it. Now with VS 2005, you don't need the shim any more. It is so handy by using...

Add-ins can get resources such as strings, icons, and bitmaps from satellite DLLs which separates resources from your add-in. The first time I tried to get add-in resources from its satellite DLL, I easily find out how to do it for resources like strings...