title: Handle event in splitter area of splitcontainer control
body: <p>Is there any trivial way to handle click event on the splitter area of the <strong>WinFroms splitcontainer</strong> control? (<strong><em>symbolized by blue in my picture</em></strong>) E.g. I'd like to collapse panel1 by double clicking this area. </p>
  
  <p>Or another possibility to put some nice button in this area and by clicking it I can collapse panels.</p>
  
  <p>I don't wanna  great hack to make a soulution, it would be nice to have a trivial one.</p>
  
  <p>Thx</p>
  
  <p>(.net 4/c#/VS2010)</p>
  
  <p><img src="https://i.stack.imgur.com/yX2sv.jpg" alt="enter image description here"></p>