Sams Teach Yourself Visual Basic 6 in 24 Hours
- 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
- 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
Data Conversion Functions
After you determine what kind of value a Variant variable or a control holds, you can convert that argument to its associated datatype. The conversion functions shown in Table 14.7 describe the conversions you can perform.
Table 14.7. The data conversion functions.
| Function | Description |
| Asc() | Converts its string argument to the ASCII number that matches the first (or only) character in the string |
| CCur() | Converts the argument to an equivalent Currency datatype |
| CDbl() | Converts the argument to an equivalent Double datatype |
| CInt() | Rounds its fractional argument to the next highest integer |
| CLng() | Converts the argument to an equivalentLong datatype |
| CSng() | Converts the argument to an equivalent Single datatype |
| CStr() | Converts the argument to an equivalent String datatype |
| CVar() | Converts the argument to an equivalent Variant datatype |
| Fix() | Truncates the fractional portion |
| Int() | Rounds the number down to the integer less than or equal to its arguments |
| Hex() | Converts its numeric argument to a hexadecimal (base-16) value |
| Oct() | Converts its numeric argument to an octal (base-8) value |
Hexadecimal is the base-16 number system. Octal is the base-8 number system.
Normally, the following assignment stores .1428571 in a label named lblValue:
lblValue.Caption = (1 / 7)
The following, however, adds precision to the label for a more accurate calculation to assign .142857142857143 to the label:
lblValue.Caption = CDbl(1 / 7)
Use these conversion functions when you need the exact datatype for more precision in calculations or controls.
Format Function | Next Section
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