title: The KeyDown event of a Simple style combo box is raised two times
body: <p>I have simple win form application with  the tab and combo box controls.</p>
  
  <ul>
  <li>Combo box control has a style of "Simple". </li>
  <li>Tab control has key down event.</li>
  </ul>
  
  <p>When I press Enter key on the combo control it fires <strong>TWO</strong> key down events. If you change the combo style to any other, the key down event fires only one which it is something I expect.</p>
  
  <p>Has anybody got any ideas why I am getting two key down events for single enter key press?
  I have found similar issue on the Microsoft website, but that was related to .NET 1.0.</p>
  
  <p><a href="http://support.microsoft.com/kb/814970" rel="nofollow">http://support.microsoft.com/kb/814970</a></p>