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
  • 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
    • Many Functions
    • Numeric Functions
    • String Functions
    • Date and Time Functions
    • Data-Testing Functions
    • Data Conversion Functions
    • Format Function
    • Summary
    • Q&A
    • Workshop
  • 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

1. What preparation must you do before the built-in functions are available to you?

2. What is the value stored in each of the following assignment statements?

   1. strA = Left("abcdefg", 3)
   2. strB = Right("abcdefg", 3)
   3. strC = Mid("abcdefg", 2, 3)
   4. strD = Mid("abcdefg", 2)

3. Is the following Mid() a function or a statement?

   Mid(strTest, 2, 4) = "abcd"
   

4. Is the following Mid() a function or a statement?

   strAns = Mid(strTest, 2, 4)
   

5. What is the value stored in each of the following assignment statements?

   1. intA = Int(20.34)
   2. intB = CInt(20.34)
   3. intC = Fix(-2.8)
   4. intD = Int(-2.8)

6. What value appears in varAns after the following assignment?

   varAns = Val(LTrim(Str("10")))
   

7. What is the 24-hour time for 12:56 p.m.?

8. What is a thousands separator?

9. True or false: You must use Format() to properly format date and time values because the built-in date and time functions cannot interpret your International settings.

10. True or false: Now returns information for both the current date and the current time.

Exercises

1. Write a program that stores the 256 ASCII characters (from ASCII 0 to ASCII 255) in a string array that's defined to hold 256 characters.
2. Write a subroutine procedure that asks the user for the time that he clocked into work and then for the time he clocked out. Display, in three labels, the total number of seconds worked, the total number of minutes worked, and the total number of hours worked.
3. Write a subroutine procedure that asks the user for her birthday. If the user entered a valid date (check to make sure and keep asking if the user did not enter a date), display a message box telling the user how many years until she reaches the retirement age of 65. If the user is older than 65, congratulate her on a long life!

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