I used PreviewClose event, but it seemd not to reach my demand. I also tried RadWindow.Confirm() method in PreviewClose event,but the Pane was already be hidden before i clicked OK or Cancl button .
It is a little tricky because of the way the event is implemented right now but we have plans to improve it. Check the attached project. I hope the code there could be useful to you.
Greetings,
Panayot
the Telerik team
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