to let any string typed in a entry of a window appear in an entry of another window...

["Antonio El Daif" <ElDaif everyday com>]

I have two windows each one containing an entry and a button. Once I click the button of the first window, the second one appear. I want help to let any string typed in the entry of the second window appear in the entry of the first one when i click the button of the second window (and i close the later window).
thanks.

antonio