Device Controler for Auto-ID with .NET

I am trying to construct a device controller with visual studio to communicate with auto-id but I do not know how to start. I have some documentation, about auto-ID and how to communicate throw web services. The web services of the Auto-Id have to be constructed or there is a set of web services created to be consumed externally? can Auto-ID communicate with an standard web service created with Visual Studio.net?, where could I find more information about this?