title: Auto close QMessageBox
body: <p>I'm building a Qt Symbian Project and I want to show a notification for the user that should auto close after some seconds. I have seen that Nokia uses this a lot in their ui. </p>
  
  <p>Right now I'm using the code below so that the user can close the QMessageBox but I would like it if it was possible to auto close the QMessageBox after 1 or 2 seconds. How can I do this using Qt? </p>
  
  <pre><code>QMessageBox msgBox;
  msgBox.setText("Hello!");
  msgBox.setIcon(QMessageBox::Information);
  msgBox.setStandardButtons(QMessageBox::Ok);
  msgBox.exec();
  </code></pre>