The fourth edition of “An Introduction to Programming Using Visual Basic 6.0” was written in 1998, the year VB 6.0 first appeared. Since then, two upgrades of the operating system, two upgrades of Microsoft Office, and a new version of Visual Basic (VB.NET) have been released. Also, some of the technologies and tools that were in vogue in 1998 have been replaced since then. The Update Edition of the book addresses these issues, modernizes the book, and responds to some requests from instructors.