Tkinter -- a window/dialog box that stays in front of everything else.

[Thaddeus L. Olczyk]

The best example I have of this is the NT task manager ( I think the
98 task manager is similar ). What I want is to be stepping through
one piece of code. At some line ( that I have to discover ) a second
piece of code will be executed. In that second piece of code I
want to popup a dialog box which I can't miss, so it has to be in
front of everything else. Can anyone help?