c# - redirecting in usercontrol

Question

I have a small problem. In a webpage i have a usercontrol (.dll) running which does some crap. Once done, it will redirect to a page. eg. succes.aspx in case of success, fail.aspx in case of failure. Now this goes very smooth, but, when i have more then 1 Internet Explorer window open, it will redirect to the one I last used. Which offcourse will in result that my "usercontrol-page" is still active in one explorer window, and my result is open in another. I call the redirect like this : System.Diagnostics.Process.Start(DestinationURL); Is there any way to sent along, that it has to stay in the currect IE ? regards, Sub