To build web applications and learn VB.NET, there are 2 very good and free editors.
Web Matrix :
http://www.asp.net/webmatrix/ and
Visual Web Developer ( a free MS product) :
http://lab.msdn.microsoft.com/express/vwd/
You will need to download the .net framework (also free) at :
http://www.microsoft.com/downloads/d...displaylang=en