Visual Studio addin: how to add a control to a VS window?

Question

Hi there,

With my C# VS add-in how can I add a menu to the "Test Result" panel and hook the event handler up to code that displays a message box or writes to the output menu or anything really, just to get things started

I can access the window with:

Window win = _applicationObject.Windows.Item("Test Results");

But I don't know how to add a menu or button

thanks a lot