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

Session scope

In ASP, session scope refers to the duration data is maintained and accessible for a particular user session. A web development session is the period between a user’s initial request to a web application and their final interaction or until the session times out due to inactivity.

ASP provides a session object, allowing developers to store and retrieve data specific to a user session. This data can be accessed throughout the session, allowing for stateful behavior within the stateless HTTP protocol. The session data, typically in memory, is stored on the server side and is associated with a unique session identifier (often stored in a cookie on the client side) that enables the server to identify the user’s session for subsequent requests.

Here’s a basic overview of how session scope works in ASP:

  • Session start: When a user accesses an ASP application for the first time or starts a new session, the server assigns a unique session ID...