Chapter 10 of Visual Basic .NET Step by Step is a real milestone for us in three ways.
First, the book declares that with this chapter, you have graduated to the next level of programming expertise: Intermediate Programmer. Congratulations! If I could pin a medal on you myself, I would!
Second, this is the first chapter of Part 3 in the book, Managing Corporate Data. For most of us, this is where we want to go. So it's going to get even more interesting from this point on.
The third point isn't mentioned in the book, so we'll cover it here. This is the right time to introduce the concepts of "analysis and design" - a key element for successful systems development.
So ... let's dive right into the process and get modular!

