title: ToolTip while Drop Down ComboBox
body: <p>I have created a combo box in my project which takes a certain amount of numbers from a file.
  This Combo drops down the list of the numbers each of represents something.
  That something I want to be displayed in a tooltip when the mouse hovers on the combo box.
  Until now everything has gone fine.
  What I want now is to see the tooltip when the mouse rolls over the list of the dop down combo.
  How can I do that? Until now the internet didn't give me something to work on it.
  Is there some one to assist me on that?</p>