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

Object-Oriented Programming

Object-oriented programming (OOP) is a programming paradigm that organizes code and data into reusable structures called objects. In our previous pieces of code, we could organize code into procedures or functions to allow for code reuse. Objects allow us to reuse code that is both executable but also stores information. In OOP, objects are instances of classes that serve as blueprints or templates for creating objects with similar properties and behaviors.

The fundamental concepts of OOP are as follows:

  • Classes: A class is a blueprint that defines the properties (attributes) and behaviors (methods) that objects of that class will possess. It describes the structure and behavior of objects but doesn’t represent any specific instance itself.
  • Objects: An object is an instance of a class. It is created from the class blueprint and has values for attributes. Objects can interact with each other if we invoke their methods.
  • Encapsulation...