当无法访问webservice URL时，如何在windows mobile中显示“无法连接”对话框?

On windows mobile when there is no internet connection and I try to browse the web using internet explorer i get cannot connect information at the top of the screen. It says cannot connect with current connection settings. To change your connection settings, tap settings. And I am able to tap Settings and setup network connections. How can I display cannot connect information programmatically? When I cannot connect to a webservice using my application I would like to show the same information and let the user set up network connections. I use compact framework 2.0 and csharp.On windows mobile when there is no internet con