Visual Basic 6 How to Program

by Deitel, Harvey M.; Deitel, Paul J.; Nieto, Tem R.

• ISBN13: 9780134569550
• ISBN10: 0134569555
• Additional ISBN(s): 9780131087286
• Edition: CD
• Format: Paperback
• Copyright: 1999-01-01
• Publisher: PRENTICE HALL
• More Book Details
• Purchase Benefits

Summary

This complete course in Visual Basic 6 comes straight from the world's leading programming trainers, Deitel & Associates. Whether you're a novice or experienced developer, here's your single source for learning both fundamental concepts and the realities of VB development for maximum performance and reliability. Start with a high-level overview of programming concepts and the VB6 Integrated Development Environment. Learn control structures, procedures, functions, arrays, string processing and basic graphics techniques. Discover VB6's powerful tools for GUI development; manage error handling and debugging; understand sequential and random access file processing; and integrate VB6 with business databases. The book includes detailed coverage of VB6 object techniques, Web development, and distributing applications with COM, COM+ and DCOM.

Table of Contents

Preface	xxx
Computing Concepts	1	(24)
Introduction	2	(1)
What is a Computer?	3	(1)
Computer Organization	4	(1)
Evolution of Operating Systems	4	(1)
Personal Computing, Distributed Computing, and Client/Server Computing	5	(1)
Machine Languages, Assembly Languages, and High-Level Languages	6	(1)
History of Visual Basic	7	(1)
Other High-level Languages	7	(1)
Structured Programming	8	(1)
What is Visual Basic?	9	(1)
General Notes About Visual Basic and This Book	10	(1)
A Tour of the Book	11	(14)
Integrated Development Environment	25	(25)
Introduction	26	(1)
Integrated Development Environment Overview	26	(2)
Project Window	28	(1)
Toolbox	29	(2)
Form Layout Window	31	(1)
Properties Window	31	(1)
Menu Bar and Tool Bar	32	(1)
A Simple Program: Displaying a Line of Text	33	(17)
Introduction to Visual Basic Programming	50	(38)
Introduction	51	(1)
Visual Programming and Event-Driven Programming	51	(1)
A Simple Program: Printing a Line of Text on the Form	52	(8)
Another Simple Program: Adding Integers	60	(4)
Memory Concepts	64	(1)
Arithmetic	64	(2)
Operator Precedence	66	(3)
Decision Making: Comparison Operators	69	(19)
Control Structures: Part I	88	(41)
Introduction	89	(1)
Algorithms	89	(1)
Pseudocode	90	(1)
Introduction to Control Structures	91	(2)
If/Then Selection Structure	93	(1)
If/Then/Else Selection Structure	94	(4)
While Repetition Structure	98	(1)
Do While Repetition Structure	99	(1)
Do Until Repetition Structure	100	(1)
Formulating Algorithms: Case Study 1 (Counter-Controlled Repetition)	101	(2)
Formulating Algorithms with Top-down, Stepwise Refinement: Case Study 2 (Sentinel-Controlled Repetition)	103	(7)
Formulating Algorithms with Top-down, Stepwise Refinement: Case Study 3 (Nested Control Structures)	110	(19)
Control Structures: Part II	129	(48)
Introduction	130	(1)
Essentials of Counter-Controlled Repetition	130	(2)
For Repetition Structure	132	(2)
Examples Using the For/Next Repetition Structure	134	(6)
Select Case Multiple-Selection Structure	140	(7)
Do/Loop While Repetition Structure	147	(2)
Do/Loop Until Repetition Structure	149	(2)
Exit Do and Exit For Statements	151	(2)
Data Type Boolean	153	(1)
Constant Variables	154	(2)
Logical Operators	156	(3)
Structured Programming Summary	159	(5)
Visual Basic Data Types	164	(13)
Sub Procedures and Function Procedures	177	(70)
Introduction	178	(1)
Form Modules	178	(2)
Sub Procedures	180	(6)
Function Procedures	186	(4)
Call-by-Value vs. Call-by-Reference	190	(4)
Exit Sub and Exit Function	194	(3)
Storage Classes	197	(1)
Scope Rules	198	(3)
Random Number Generation	201	(7)
Example: A Game of Chance	208	(6)
Recursion and the Factorial Function	214	(3)
Another Recursion Example: The Fibonacci Series	217	(3)
Recursion vs. Iteration	220	(1)
Optional Arguments	221	(2)
Named Arguments	223	(2)
Visual Basic Math Functions	225	(1)
Code Modules	226	(21)
Arrays	247	(55)
Introduction	248	(1)
Arrays	248	(1)
Declaring Arrays	249	(2)
Examples Using Arrays	251	(7)
Passing Arrays to Procedures	258	(5)
Sorting Arrays	263	(3)
Searching Arrays: Linear Search and Binary Search	266	(5)
Multidimensional Arrays	271	(3)
Control Arrays	274	(4)
Dynamic Arrays	278	(7)
Variable Arguments: ParamArray	285	(1)
Function Array	286	(16)
Strings, Dates and Times	302	(69)
Introduction	303	(1)
Fundamentals of Characters and Strings	304	(1)
String Data Type	305	(1)
String Concatenation with & and +	305	(1)
Comparing Character Strings	306	(3)
Operator Like	309	(2)
Manipulating the Individual Characters in a String: Mid$	311	(1)
Left$, Right$, and InStr	312	(3)
Searching for Substrings in Strings using InStr and InStrRev	315	(2)
LTrim$, RTrim$ and Trim$	317	(1)
String$ and Spaces$	317	(2)
Replacing Substrings in a String with Function Replace	319	(1)
Reversing Strings with Function StrReverse	319	(1)
Converting Strings to Uppercase and Lowercase	320	(1)
Conversion Functions	321	(6)
Asc and Chr$	321	(1)
IsNumeric, Val and Str$	322	(1)
Hex$ and Oct$	323	(1)
The Type Conversion Functions	324	(3)
String Formatting	327	(13)
Function Format$ and Named Numeric Formats	327	(2)
Function Format$ and User-Defined Numeric Formats	329	(4)
Function FormatNumber	333	(2)
Function FormatCurrency	335	(3)
Function FormatPercent	338	(2)
Date and Time Processing	340	(8)
Date and Time Formatting	348	(5)
String Arrays	353	(18)
A Card Shuffling and Dealing Simulation	356	(15)
Graphics	371	(37)
Introduction	372	(1)
Coordinate Systems	372	(2)
Drawing Methods	374	(8)
Drawing Properties	382	(5)
Line Control and Shape Control	387	(3)
Colors	390	(8)
Images	398	(2)
Printer Object	400	(8)
Basic Graphical User Interface Concepts	408	(50)
Introduction	409	(1)
Controls	409	(3)
TextBox Control	412	(2)
MaskEdit Control	414	(5)
ComboBox Control	419	(4)
ListBox Control	423	(4)
Scrollbars	427	(4)
Slider Control	431	(2)
Menus	433	(4)
Pop-up Menus	437	(1)
Function MsgBox	438	(20)
Advanced Graphical User Interface Concepts	458	(50)
Introduction	459	(1)
Multiple Document Interface (MDI)	459	(10)
Multiple Forms	469	(6)
Template Forms	475	(5)
Rich TextBox Control	480	(5)
UpDown Control	485	(4)
ImageList Control	489	(3)
ImageCombo Control	492	(3)
FlatScrollBar Control (Professional and Enterprise Editions)	495	(3)
Native Code Compilation (Professional and Enterprise Editions)	498	(10)
Mouse and Keyboard	508	(29)
Introduction	509	(1)
Changing the Shape of the Mouse Pointer	509	(3)
Mouse Events	512	(3)
Mouse Buttons	515	(2)
Shift, Ctrl and Alt Keys	517	(3)
Drag-and-Drop	520	(6)
Key Events	526	(3)
KeyPreview Property	529	(8)
Error Handling and Debugging	537	(41)
Introduction	538	(1)
When Error Handling Should Be Used	539	(1)
A Simple Error-Handling Example: Divide by Zero	539	(3)
Nested on Error Statements	542	(2)
Err Object	544	(3)
Resume Statement	547	(3)
Error Handlers and the Call Stack	550	(5)
Rethrowing Errors	555	(1)
Break Mode, the Immediate Window, and the Debug Object	556	(3)
First Steps in Bug Prevention	559	(1)
Debugging Strategies	560	(2)
Debugger	562	(9)
Debug Menu and Debug Tool Bar	562	(5)
Locals Window	567	(1)
Watch Window	568	(2)
Call Stack Window	570	(1)
Debugger and Error Handlers	571	(7)
Sequential File Processing	578	(37)
Introduction	579	(1)
DirListBox, FileListBox, and DriveListBox Controls	579	(4)
Data Hierarchy	583	(1)
File System Objects	584	(15)
Creating a Sequential Access File	599	(4)
Reading Data from a Sequential Access File	603	(5)
Updating Sequential Access Files	608	(7)
Records and Random-Access Files	615	(30)
Introduction	616	(1)
Random-Access Files	616	(1)
Records as User-Defined Types	617	(2)
User-Defined Type Definitions	617	(1)
Manipulating Members of User-Defined Types	618	(1)
Creating a Random-Access File	619	(5)
Writing Data Randomly to a Random-Access File	624	(3)
Reading Data Sequentially from a Random-Access File	627	(3)
Reading Randomly from a Random-Access File	630	(3)
Example: A Transaction Processing Program	633	(12)
Object-Oriented Programming	645	(63)
Introduction	646	(2)
Data Abstraction and Information Hiding	648	(1)
Implementing a Time Abstract Data Type with a Class	649	(4)
Class Members	653	(7)
Composition: Objects as Instance Variables of Other Classes	660	(6)
Introduction to Object-Oriented Programming	666	(3)
Software Engineering with Components	669	(1)
Type Fields and Select Case Statements	669	(1)
Polymorphism	670	(1)
Visual Basic Interfaces	671	(1)
Polymorphism Examples	671	(2)
Case Study: IShape, CPoint, CCircle	673	(4)
Case Study: A Payroll System Using Polymorphism	677	(7)
Case Study: Polymorphic Processing of Shapes	684	(4)
Simulating Implementation Inheritance with Interface Inheritance and Delegation	688	(6)
Object Browser	694	(1)
Events and Classes	695	(13)
ActiveX	708	(58)
Introduction	709	(1)
Components, COM and DCOM	709	(4)
ActiveX Control Types	713	(2)
ActiveX Control Lifetime and Events	715	(1)
UserControl Object	716	(1)
Creating an ActiveX Control That Contains Constituent Controls	717	(7)
ActiveX Control Example: Clock Control	724	(7)
ActiveX Control Interface Wizard	731	(10)
Property Pages and the Property Page Wizard	741	(5)
ActiveX DLLs	746	(4)
ActiveX EXEs	750	(5)
Friend Access	755	(11)
Database Management	766	(42)
Introduction	767	(1)
Database Systems	768	(1)
Advantages of Database Systems	768	(1)
Data Independence	768	(1)
Database Languages	769	(1)
Distributed Database	769	(1)
Relational Database Model	769	(2)
Relational Database	769	(2)
Introducing the Microsoft ADO Data Control 6.0 and Microsoft DataGrid Control 6.0	771	(5)
Relational Database Overview: The Biblio.mdb Database	776	(3)
Structured Query Language	779	(5)
Basic Select Query	780	(1)
Where Clause	780	(1)
Order By Clause	781	(1)
Using Inner Join to Merge Data from Multiple Tables	782	(1)
All Titles Query from Biblio.mdb	783	(1)
Revisiting the ADO Data Control and DataGrid Control	784	(4)
Hierarchical FlexGrid Control	788	(1)
DataList and DataCombo Controls	789	(7)
Example: Using the DataCombo and DataList Controls	790	(4)
Using the BoundColumn Property	794	(2)
Using the Data Environment Designer	796	(5)
Other Programmatic Capabilities of Recordsets	801	(1)
Transaction Processing	801	(7)
Networking, the Internet and the World Wide Web	808	(52)
Introduction	809	(1)
Visual Basic Internet Controls	810	(1)
WebBrowser Control	811	(5)
Internet Transfer Control	816	(6)
Hypertext Transfer Protocol (HTTP) Connections	816	(2)
File Transfer Protocol (FTP) Connections	818	(4)
Other Properties, Methods and Events of the Internet Transfer Control	822	(1)
Winsock Control	823	(3)
Establishing a Simple Server (Using TCP Protocol)	823	(2)
Establishing a Simple Client (Using TCP Protocol)	825	(1)
Example: Client/Server Interaction with the Winsock Control	826	(8)
A Simple TCP-Based Server	826	(3)
A Simple TCP-Based Client	829	(3)
Outputs of the Client/Server Interactions	832	(2)
Winsock Control and UDP-Based Client/Server Computing	834	(5)
A Simple UDP-Based Server	834	(2)
A Simple UDP-Based Client	836	(2)
Outputs of the Client/Server Interactions	838	(1)
Other Properties, Methods and Events of the Winsock Control	839	(1)
Visual Basic Script (VBScript®): An Overview	840	(20)
Multimedia: Images, Animation, Audio	860	(36)
Introduction	861	(1)
Microsoft Agent Control	862	(8)
Multimedia MCI Control	870	(6)
A Multimedia MCI Control CD Player	872	(2)
A Multimedia MCI Control AVI File Player	874	(2)
Animation Control	876	(4)
RealAudio ActiveX Control Library	880	(2)
Marquee Control Library	882	(3)
Microsoft ActiveMovie Control	885	(11)
Data Structures, Collections and Dictionaries	896	(48)
Introduction	897	(1)
Type Variant	897	(2)
Self-Referential Classes	899	(1)
Dynamic Memory Allocation	900	(1)
Linked Lists	900	(12)
Stacks	912	(3)
Queues	915	(2)
Trees	917	(7)
Collection Object	924	(4)
Dictionary Object	928	(16)
Appendix A Operator Precedence Chart	944	(2)
Appendix B ANSI Character Set	946	(1)
Appendix C Visual Basic Internet and World Wide Web Resources	947	(6)
C.1 Visual Basic Web Resources	947	(1)
C.2 Microsoft Visual Basic Web Sites	947	(1)
C.3 Visual Basic Resources	948	(1)
C.4 FAQs	949	(1)
C.5 Tutorials for Learning VB	950	(1)
C.6 VB Newsgroups and Mailing lists	950	(1)
C.7 VB Books and Magazines	951	(1)
C.8 VB Products	952	(1)
Appendix D Number Systems	953	(14)
D.1 Introduction	954	(3)
D.2 Abbreviating Binary Numbers as Octal Numbers and Hexadecimal Numbers	957	(1)
D.3 Converting Octal Numbers and Hexadecimal Numbers to Binary Numbers	958	(1)
D.4 Converting from Binary, Octal, or Hexadecimal to Decimal	958	(1)
D.5 Converting from Decimal to Binary, Octal, or Hexadecimal	959	(2)
D.6 Negative Binary Numbers: Two's Complement Notation	961	(6)
Bibliography	967	(4)
Index	971

Excerpts

Welcome to Visual Basic 6 and the exciting world of Internet and World Wide Web programming! This book is by an old guy and two young guys. The old guy HMD; Massachusetts Institute of Technology (MIT) 1967 has been programming and/or teaching programming for 37 years. The two young guys PJD; MIT 1991 and TRN; MIT 1992 have each been programming for 15 years and have caught the teaching and writing "bug." The old guy programs and teaches from experience; the young guys do so from an inexhaustible reserve of energy. The old guy wants clarity; the young guys want performance. The old guy seeks elegance and beauty; the young guys want results. We got together to produce a book we hope you will find informative, interesting, challenging and entertaining. Why We Wrote Visual Basic 6 How to Program Dr. Harvey M. Deitel taught introductory programming courses in universities for 20 years with an emphasis on developing clearly written, well-structured programs. Much of what is taught in these courses is the basic principles of programming with an emphasis on the effective use of control structures, primitive data types, arrays, functions and the program development process. We present these topics in Visual Basic 6 How to Program exactly the way HMD has done in his university courses. Our experience has been that students handle the material in the early chapters on primitive data types, control structures, procedures and arrays in about the same manner as they handle introductory Pascal or C courses. There is one noticeable difference though: students are highly motivated by the fact that they are learning a leading-edge language (Visual Basic 6) and leading-edge programming paradigms (event-driven programming and object-oriented programming) that will be immediately useful to them as they leave the university environment. This increases their enthusiasm for the material. Students quickly discover that they can do great things with Visual Basic 6, so they are willing to put incredible effort into their courses. Our goal was clear: produce a Visual Basic 6 textbook for introductory university-level courses in computer programming for students with little or no programming experience, yet offer the depth and the rigorous treatment of theory and practice demanded by traditional, upper-level C and C++ courses and that satisfies professionals' needs. To meet these goals, we produced a comprehensive book because our text also patiently teaches the principles of control structures, event-driven programming, object-oriented programming and the Visual Basic 6 language. Visual Basic 6 How to Program was written fresh on the heels of C How to Program: Second Edition, C++ How to Program: Second Edition and Java How to Program: Second Edition, each of which has become the world's leading introductory textbook in its respective field. Hundreds of thousands of students and professional people worldwide have learned C, C++ and Java from these texts. Upon publication in November, 1998 Visual Basic 6 How to Program will be used in universities, professional schools and corporate training programs worldwide. We have prepared an interactive multimedia CD-ROM edition of this book - the Visual Basic 6 Multimedia Cyber Classroom. Prentice Hall offers a "value pack" edition of both Visual Basic 6 How to Program and the Visual Basic 6 Multimedia Cyber Classroom called The Complete Visual Basic 6 Training Course at a discount for people who want to use both the book and the multimedia CD. Please see the last few pages of this book for ordering instructions. The Complete Visual Basic 6 Training Course is discussed in more detail later in this Preface. We believe in Visual Basic 6. Its conceptualization by Microsoft, the creators of Visual Basic 6, is brilliant: Base a language on one of the world's most widely known languages, Basic. Endow the language with the ability to conveniently build applications