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我正在使用 microsoft VSTS 模态对话框 ，当从“x”（模态对话框的关闭按钮）关闭模态对话框时，我想要一条确认消息，我收到关闭事件，该事件在事件对话框关闭后触发。
在关闭对话框之前我想要一个事件。我怎样才能做到这一点？