In my application I catch a DragOver event and then perform an action. I'd like to wait for half a second before performing the action, the action should not be performed after that delay if the drag operation has ended.

The only way I could think of to implement this feature is something like this:

Function DragOver Event
   If TimerTimeReached Then
      PerformDragAction
   Else If Not TimerStarted
      StartTimer
   End
End Function  

Function DragLeave Event
   If TimerStarted
      StopTimer
   End
End Function

Is there a better way to perform this operation?