Showing menu as popup menu?

Does anyone know of an efficient way to show a menu item with subitems as
a popup menu?  Namely, my main window has an Edit menu that I want
available as a popup menu when the user right-clicks in the main window.  
These items change often and I am trying to reduce redundancy; that is, I
only want to change the Edit menu at run-time and have the changes
reflected in the popup menu.

        -Sean

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