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

Functions and Procedures

Procedures and functions are essential concepts in programming that allow developers to break down complex tasks into smaller, manageable pieces of code that can be reused throughout a program.

A procedure is a named section of code that performs a specific task. The procedure does not return a value and typically modifies data within the program. Procedures are used to group related tasks, such as input/output operations or data validation, and can be called from other program parts.

A function is a named section of code that returns a value. It may or may not modify data within the program. Functions are used to perform specific calculations or operations and can be called from other parts of the program.

Both procedures and functions can take arguments; inputs are passed to the code block to perform the task. For example, arguments can be used to provide a code block with necessary data or modify the behavior of the code block.

In this chapter...