I hope I've guessed what you want correctly. If not, then my apologies all round.
Web applications sometimes need to look like conventional windows applications. I guess you want a browser window without all the stuff at the top and bottom of the frams such as the URL (the 'location') Normally, the best approach is to open the window for your application using javascript by means of the window:open() method from your initial application window... This allows you control over whether the 'location' is visible (the input field for entering URLs directly into the browser), amongst a whole lot of other attributes that can be changed, such as toolbar visibility, directories, status-bar visibility, menubar visibility, window frame, width and height to get the browser to look exacly how you want it to look.
One thing you have to be particularly careful with. Popup-blockers will detect your use of the wondow:open method and will try to block it if it is not within and anchor (<a>).Various popup-blockers work in different ways, so you might need to experiment.
Let me know if I'm on the right track about your requirements, and if so, whether you would like some sample code to get you started! As I use javascript directly rather than abstract all the nitty-gritty behind .NET, then Adam, or some other Guru had beeter chip in with the 'Softie' solution.