Book Image

Visual Basic Quickstart Guide

By : Aspen Olmsted
Book Image

Visual Basic Quickstart Guide

By: Aspen Olmsted

Overview of this book

Whether you’re an absolute beginner or an experienced developer looking to learn the Visual Basic language, this book takes a hands-on approach to guide you through the process. From the very first chapters, you'll delve into writing programs, exploring core concepts such as data types, decision branching, and iteration. Additionally, you’ll get to grips with working with data structures, file I/O, and essential object-oriented principles like inheritance and polymorphism. This book goes beyond the basics to equip you with the skills to read and write code across the entire VB family, spanning VB Script, VBA, VB Classic, and VB.NET, enabling you to handle legacy code maintenance with ease. With clear explanations, practical examples, and hands-on exercises, this book empowers you to tackle real-world software development tasks, whether you're enhancing existing projects or embarking on new ones. It addresses common challenges like distinguishing between the variations of the VB programming language to help you choose the right one for your projects. Don't let VB's extensive legacy daunt you; embrace it with this comprehensive guide that equips you with practical, up-to-date coding skills to overcome the challenges presented by Visual Basic's rich history of over two decades.
Table of Contents (27 chapters)
Free Chapter
1
Part 1:Visual Basic Programming and Scripting
9
Part 2:Visual Basic Files and Data Structures
14
Part 3:Object-Oriented Visual Basic
20
Part 4:Server-Side Development

Inheritance differences in family members

Inheritance in VB.NET and VB6/VBA share the same core concept of allowing classes to inherit properties and behaviors from other classes. However, there are significant differences in how inheritance is implemented and supported between the two versions of VB. Let’s look at these differences.

VB6/VBA

  • Limited support: VB6 supports basic OOP, including inheritance. However, it lacks some essential features that are found in modern object-oriented languages.
  • Class modules: In VB6, you create classes using class modules. Each class can have properties, methods, and events.
  • Inheritance keyword: VB6 uses the Inherits keyword to establish an inheritance relationship between derived and base classes. However, VB6 does not support the inheritance of implementation details as it lacks the concept of access modifiers such as public, protected, or private.
  • Interface-based inheritance: VB6 supports interface-based inheritance...