title: How to move to another window in Qt by a pushbutton
body: <p>I am using <a href="http://www.google.com/search?q=site%3aen.wikipedia.org+Qt%20creator&amp;num=%i&amp;ie=utf-8&amp;oe=utf-8" rel="nofollow">Qt Creator</a> 2.0.1 based on Qt 4.7.0 (32bit). I am new to Qt.</p>
  
  <p>I created a mainwindow. How do I go to another window when I press the pushbutton in the main window?</p>