As other readers have commented, this book needs editing, contains errors, and will not teach you most of what you need for the MS Certification exam. It really is an intro to VB. But what I DID like about the book is that their "Check It Out" exercises got me USING VB, rather than just reading about VB. This emphasis on using the product as you read the book is more effective than most books programming books, where it's easy to read, forget half of what you read, and never really use the product.