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
    • Comparison Operators
    • The If Statement
    • The If Statement's Else Branch
    • Compound Comparisons with the Logical Operators
    • Multiple Choice with Select Case
    • Two Additional Select Case Formats
    • Summary
    • Q&A
    • Workshop
  • Hour 8.Visual Basic Looping
  • Part III:Putting Code to Work
  • Hour 9.Combining Code and Controls
  • 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

Workshop

The quiz questions and exercises are provided for your further understanding. See Appendix B for the answers.

Quiz

• How do comparison operators differ from mathematical operators?

• What role does the ASCII table play in comparison logic?

• Do the following statements produce true or false results?

  25 <= 25
  "a" >= "B"
  0 < -1
  234.32 > 234.321

• When do you code the Else portion of an If statement?

• True or false: The End If statement isn't needed for one-line If statements.

• Which statement replaces nested If...Else logic?

• Which Case option checks for a range of values?

• What happens if every Case fails and there is no Case Else option?

• What role do code blocks play in Select Case statements?

• What is wrong with this If statement?

  If (intA < 1) And (intC >= 8) Then
    lblDraft.Caption = "Overdrawn"
  Else
    lblDraft.Caption = "Underdrawn"
  End Else
              

Exercises

• Rewrite the following nested If statement using a single If with a logical operator:

  If (A > 3) Then
    If (B > 10) Then
      lblAns.Caption = "Yes"
    End If
  End If
              

• Rewrite the following If to eliminate the Not and to clarify the code:

  If Not(X < 10) Or Not(Y >= 20) Then
              

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