You have a lot to learn...
You should learn how ADO.net works, first of all.
There are several objects involved (Datasets, Data Adapters, etc.).
You're probably going to have to make some incremental inroads with such tasks as how to open the source files involved (writing a small project to explore how that's done), and also how to send data to the files involved.
Getting a beginning book on .NET would be good, then sit down and read it with a cup of coffee. .NET is much more robust than
VB 6; It will take effort.
(I don't mean to lecture. I'm only saying "you have asked a mouthful!")