I have defined a custom tooltip class that will be called when i mouse over the target item. For this i am creating an instance of custom tooltip in the tooltip create event and assigning it to the the events tooltip. On the tooltip show event i am trying to position the tooltip based on its dynamic height and width. But the problem i am having is the tooltip's height and width seem to have the default value and it does not get populated by the show event. Is there any way that i can resolve the problem?