How to add new menu item to Browser and Workspace

I want to add new menu item(associated with action) to the right click menu of Workspace and Browser.
How do I do it ?

This was answered by Vassili Bykov in
http://blog.3plus4.org/2008/08/14/inside-the-refactoring-browser/

Thank you Vassili.

Hiren Thacker wrote

I want to add new menu item(associated with action) to the right click menu of Workspace and Browser.
How do I do it ?