Cleaning Up an Application When the Window is Closed

[W. Watson]

Suppose I write some Win XP application using the Tkinter GUI, and do not 
provide a mechanism to exit other than the user clicking on the X in the 
upper right corner of a window. Is there a mechanism that will allow me to 
put up an save-dialog to give the user the option to save his present state 
of data?
-- 
                          Wayne Watson (Nevada City, CA)

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