This book investigates the architecture and application of Visual Basic 4.0, a significant iteration in Microsoft's BASIC programming language family. Kofler, an established author in the field of computer programming, draws upon his extensive experience to provide a comprehensive guide to this development environment. The work details the object-oriented features introduced in version 4.0, the integrated development environment (IDE), and practical examples for building Windows applications.

This technical manual is recognized for its thoroughness in detailing Visual Basic 4.0's features, particularly its object-oriented advancements. It serves as a valuable resource for developers seeking to understand and utilize this specific version of the programming language. The book's detailed approach suggests it is aimed at programmers with some existing knowledge, offering a deep dive into the software's functionalities and application development potential.