Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying Visual Basic Quickstart Guide
  • Table Of Contents Toc
Visual Basic Quickstart Guide

Visual Basic Quickstart Guide

By : Aspen Olmsted
5 (4)
close
close
Visual Basic Quickstart Guide

Visual Basic Quickstart Guide

5 (4)
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)
close
close
Lock 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

Understanding variable scope

In VB, variable scope refers to where a variable can be accessed within a program. Variables can be declared at different levels of scope, and their visibility and accessibility can depend on where they are declared.

There are three levels of variable scope in VB:

  • Procedure-level scope: Variables declared within a procedure or function are only accessible within that procedure or function. Once the procedure or function has been completed, the variables are destroyed, and their values are lost. Here’s an example:
    Sub mySub()
      Dim myInteger As Integer
      myInteger = 45
    End Sub

    In this example, the myInteger variable is declared within the mySub procedure. Therefore, it can only be accessed within that procedure and is destroyed when completed.

  • Module-level scope: Variables declared outside any procedure or function are accessible throughout the entire module. They can be used in any procedure or function within the...
CONTINUE READING
83
Tech Concepts
36
Programming languages
73
Tech Tools
Icon Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.
Icon Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
Icon 50+ new titles added per month and exclusive early access to books as they are being written.
Visual Basic Quickstart Guide
notes
bookmark Notes and Bookmarks search Search in title playlist Add to playlist download Download options font-size Font size

Change the font size

margin-width Margin width

Change margin width

day-mode Day/Sepia/Night Modes

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Confirmation

Modal Close icon
claim successful

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY

Submit Your Feedback

Modal Close icon
Modal Close icon
Modal Close icon