http://purl.org/tcl/home/man/tcl8.4/TkCmd/toplevel.htm















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[DKF] notes that, "toplevels on UNIX/X are really a collection of several windows; the window you draw on (which is what [winfo id] will tell you), another window for a menubar (if you've installed one) and a third one to contain the other two.
If you do 'xwininfo -tree' you should be able to find out what's *really* going on."



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