While I have written a lot of articles and posts about the commandbars of Visual Studio (the most popular is HOWTO: Adding buttons, commandbars and toolbars to Visual Studio .NET from an add-in), I hadn’t written about the following case yet, that I use extensively in my own MZ-Tools add-in and that was mentioned at the end of that article but no code sample was provided:

HOWTO: Create a context menu using a Visual Studio commandbar popup from an add-in
http://www.mztools.com/articles/2011/MZ2011015.aspx