qt4 - why Mainwindow is closed during pressing the OK button of the messagebox -

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i have mainwindow , button.i parsing 1 xml , rwesult displayed in messagebox...when pressed ok button of messagebox show next loop of xml...and @ end mainwindow closed.i dont want close mainwindow....how achieve it?????

it seems mainwindow dialog. try change type of form (formborderstyle property). maybe, should change property acceptbutton.


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