Visual Basic and vb.net

I was a moderately successful VB6 programmer (I mean nothing complicated, just pretty simple applications for my own use). I am trying to "migrate" myself to Visual Studio 2010 (in particular, VB). Oh my gosh, that has changed! Having no experience with the intermediate versions, I feel that I have on my head.

One thing that I really don’t understand is the connection between the standalone Visual Basic application (for example, an application that runs on a computer and not on web pages that I always developed) and vb. network application. When I use Visual Studio help functions for specific classes, some of the pages say they are for .net functions. How can I translate this only into a standalone application?

I specifically want to create a simple application to capture and display incoming TCP packets from the iPhone application that I am developing. This means that I better understand sockets. It was pretty simple in VB6 (I did it before), but I really need to do it in 2010.

I apologize for my stupidity. At 58, my mind simply does not capture new concepts, as it was before, especially in terms of the speed with which they accelerate.