title: How to get the Screen position of a control inside a group box control?
body: <p>well i was PointToScreen() but when the control is inside a group box this method dont work and gives me wrong coordinates.<br>
  so is there is anyother method to get the position of a control inside a group box control?<br>
  i need that screen position so i can display a dialog near that control.<br>
  thanks</p>