Dragan,
I have used ASP.NET professional from Wrox too, and it's OK. Most of the code is in
VB.NET, but some code pieces are written in C#. For the Context and Context.Handler, however, I recommend soem articles and code samples on net. Generally, you have not to use ASP.NET pages in the way to posting form from one page to the other. If you need some communication between the pages, think about the Web services.
HTH.
Milos R.
...but the Soon is eclipsed by the Moon