... but not enough for the exam. This book is great for a relatively inexperienced programmer to quickly expand their knowledge with examples.
Its biggest flaw is that it really is not sufficient, on its own, to prepare for the exam certification. The cover states "Everything you need to pass Microsoft's Visual Basic 6 Certification Exam". The "blurb" on the cover is, in my opinion, overly ambitious and the contents do not fully realise this ambition. If you are interested in the Microsoft Certification, then this book is a useful supplement only. You will need to have another serious reference with this "guide" serving as backup.
If you are inexperienced and starting a new job as a VB programmer this is an excellent way to rapidly ramp up your knowledge and experience and a very useful reference. However, once you are up to speed and want to take your knowledge to the next level, even just for certification, you will then see the limitations of this "All in one" book.
THE BOTTOM LINE - if you want it to rapidly expand your basic VB programming experience this performs well, however, if you do want a complete "VB Certification" book to prepare you for the MCP's, this is DEFINITELY NOT the book for you unless you want it to supplement your study of another book/course.