.Net Explanation

Question

I have a program done in Access2003 and am looking to migrate it into VB. What I am looking for is an explanation of VB.Net. Is it used just for developing Web based programs because mine is not web based? Should I just use VB6 instead. I am just looking for some explanations of what VB.Net is to determine if it is what I want. Sorry for such a basic (possibly stupid) question but I am just starting my research. Thanks