title: WPF MessageBox buttons aren't OS themed
body: <p>So the buttons of my message box in WPF aren't themed by the OS.<br>
  I even tried <a href="https://stackoverflow.com/questions/5289328/wpf-messagebox-window-style/5289462#5289462">this method</a> and it didn't work.</p>
  
  <p>I have a manifest, I am running under Windows 7 Ultimate x86 and .NET Framework 4 Client Profile.</p>
  
  <hr>
  
  <p><strong>EDIT: It works now.</strong></p>