How do I prevent the closing of modal popup window(ModalPopupExtender) on postback?

Question

I\'m using Microsoft AjaxControlToolkit for modal popup window.

And on a modal popup window, when a postback occurred, the window was closing. How do I prevent from

Answer 1

I guess that works but not in my case. I've a user control that opened in a modal popup and this user control makes postback itself. So in that user control I've no modal popup property.

I guess, I've to create an event for my user control, and the page that opens the modal popup have to reopen it in this event.