Sams Teach Yourself Visual Basic 6 in 24 Hours

By Greg Perry

• Table of Contents
  • Copyright
  • About the Author
  • Acknowledgments
  • Introduction
  • Who Should Read This Book
  • What This Book Will Do for You
  • Can This Book Really Teach Visual Basic in 24 Hours?
  • What You Need
  • Files on the Visual Basic Distribution CD-ROM
  • Conventions Used in This Book
  • Enough! Time Is Ticking!
  • Part I: Introducing Visual Basic
  • Hour 1. Visual Basic at Work
  • Hour 2.Analyzing Visual Basic Programs
  • Hour 3.Controls and Properties
  • Hour 4.Examining Labels, Buttons, and Text Boxes
  • Part II: Coding the Details
  • Hour 5.Putting Code into Visual Basic
  • Hour 6.Message and Input Boxes
  • Hour 7.Making Decisions
  • Hour 8.Visual Basic Looping
  • Part III:Putting Code to Work
  • Hour 9.Combining Code and Controls
    • The Interest Calculation Application
    • Using Control Arrays
    • Finishing the Form
    • Adding Code
    • The Unload Statement
    • Finishing Touches
    • Error Checking
    • Summary
    • Q&A
    • Workshop
  • Hour 10.List Boxes and Data Lists
  • Hour 11.Additional Controls
  • Hour 12.Dialog Box Basics
  • Part IV:Programming with Data
  • Hour 13.Modular Programming
  • Hour 14.Built-In Functions Save Time
  • Hour 15.Visual Basic Database Basics
  • Hour 16.Printing with Visual Basic
  • Part V:Sprucing Up Programs
  • Hour 17.Menus and Visual Basic
  • Hour 18.The Graphic Image Controls
  • Hour 19.Toolbars and More Graphics
  • Hour 20.Writing Correct Applications
  • Part VI:Advancing Visual Basic Applications
  • Hour 21.Visual Basic and ActiveX
  • Hour 22.Object Basics
  • Hour 23.Distributing Your Applications
  • Hour 24.Online Visual Basic
  • Part VII:Appendixes
  • Appendix A.Operator Precedence
  • Appendix B.Answers
  • Appendix C.Using the CD-ROM

Q&A

1. Why doesn't End terminate an application properly? End seems to work fine without the extra Unload statement.

   End does work fine for single-form applications. Problems can arise, however, if you create applications with multiple forms. In certain cases, the End statement might fail to release every form's resources. In today's multitasking, multiuser networked world, you need to release resources as soon as you can so that other processes have access to those resources (such as memory and CPU time). The Unload statement takes care of closing forms properly.

2. How can I find the default properties for all controls?

   Surprisingly, Visual Basic's online help doesn't list the default properties. The default properties are the most common properties referenced for a control. Therefore, the default property for a text box is the Text property, and the default property for a label is the Caption property. Generally, using a control's default property makes for less typing, but default properties can add confusion later when you try to figure out the code and change it. If you use default properties, use them only for the Label and Text Box, but specify all other controls' default properties explicitly so that your code is as clear as possible.

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