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

Finishing the Form

You can quickly finish the form now. While the label and text box still reside on the Windows Clipboard, this would be a good time to add the Ending Investment label and text box. Select Edit | Paste once again and set the pasted label's properties as follows:

   Name:                         lblEnding
   
   Caption:                      Ending Investment:
   
   Left:                         1800
   
   Top:                          4560
   
   Width:                        2895

Set the text box's properties as follows:

   Name:                         txtEnding
   
   Left:                         4920
   
   Locked:                       True
   
   TabStop:                      False (so the user cannot send the focus to this textbox)
   
   Top:                          4560
   
   ToolTipText:                  Compounded Investment
   
   Width:                        1455

The new property you set just now is the Locked property. When you lock a control, Visual Basic allows no user editing of the control. Therefore, the code beneath the form can modify the text box's Text property but the user cannot. The final text box will be a holding place for the calculated compound investment amount, so the user should not be allowed to edit the control even though it's a Text Box control.

Add a command button named cmdCompute, add the caption &Compute Interest, and add a ToolTipText value of Click to compute final investment. Place and size the command button as follows: Height: 495, Left: 2640, Top: 3360, and Width: 2535. Add a final command button named cmdExit to the lower-right corner with the E&xit Caption property.

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