Web page inside a .NET application

Question

I would like to write an application that can get the HTML source of a web page. Unfortunately, the pages I am after cannot be gotten to directly with a URL as it requires doing a search on the web page. How can I obtain this using a .NET application? One way I thought of was to have a control that gave like a mini-browser. The mini-browser would be fully interactive like a normal browser but the source of the mini-browser could be obtained by the hosting .NET application. Is this possible? Can someone point me in the right direction? Thanks.