title: Capturing WndProc message of a certain button click
body: <p>I have a cancel button on my form. I want to determine inside the <code>WndProc</code> method that this <code>Cancel</code> button is clicked and write some code for it. This is absolutely necessary because otherwise I'm not able to cancel all other control validation events that are yet to be performed.</p>
  
  <p>Please help.</p>
  
  <p>.NET - 2.0, WinForms</p>