title: Hot to get cursor position relative to upper left corner of the control?
body: <p>When I clicked on a control,</p>
  
  <p>How to get cursor position relative to upper left corner of a (winforms) control ?</p>
  
  <p>C#, VS 2005</p>
  
  <p>PS:
  I'm asking on context of tooltip "show" method which need that coordinates ..</p>