Hi yao wang,
I have already answered you in these forum posts.
http://www.telerik.com/automated-testing-tools/community/forums/aspnet-ajax/window/how-to-get-the-current-position-of-radwindow.aspx
http://www.telerik.com/automated-testing-tools/community/forums/aspnet-ajax/window/reposition-radwindow-and-open-multiple-windows.aspx
Please do not open multiple forum threads on a same subject.
Sincerely yours,
Georgi Tunev
the Telerik team
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