title: Tree Show toolTip during drag
body: <p>I am denying a user the ability to drop into my tree during certain conditions, it's all going well, but I want to tell the user why I'm denying the drop. I would prefer to do it with a toolTip, but it doesn't seem to work. Can I not have a toolTip during a drag operation? How can I force one? </p>
  
  <p>Flex seems to treat toolTips as a property of the UI component, with the component deciding when and if to show it. I would like it to force it to be like doing one in javaScript where it was always just like saying "Show it now" "stop showing it now"</p>
  
  <p>Does anyone know about doing this during drag?</p>
  
  <p>Thanks<br>
  ~Mike</p>