Written by Kate Gregory, Clayton Walnum,
and Paul Kimmel
Copyright © 1996 by Que ® Corporation.
All rights reserved. Printed in the United States of America. No part of this book may be used or reproduced in any form or by any means, or stored in a database or retrieval system, without prior written permission of the publisher except in the case of brief quotations embodied in critical articles and reviews. Making copies of any part of this book for any purpose other than your own personal use is a violation of United States copyright laws. For information, address Que Corporation, 201 W. 103rd Street, Indianapolis, IN, 46290. You may reach Que's direct sales line by calling 1-800-428-5331.
ISBN: 0-7897-0893-0
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| President | Roland Elgey | Publisher | Joseph B. Wikert |
| Publishing Manager | Fred Slone | Director of Marketing | Lynn E. Zingraf |
| Editorial Services Director | Elizabeth Keaffaber | Managing Editor | Sandy Doell |
| Title Manager | Bryan Gambrel | Project Director | Angela Kozlowski |
| Production Editor | Matthew B. Cox | Editors | Kelli Brooks, Sean Dixon, Bill McManus, Jeani Smith |
| Product Marketing Manager | Kim Margolius | Assistant Product Marketing Manager | Christy M. Miller |
| Technical Editors | David Medinets, Bob Reselman, Daniel Berkowitz, Marc Gusmano | ||
| Technical Specialist | Nadeem Muhammed | Acquisitions Coordinator | Carmen Krikorian |
| Operations Coordinator | Patricia J. Brooks | Editorial Assistant | Andrea Duvall |
| Book Designer | Ruth Harvey | Cover Designer | Dan Armstrong |
| Production Team | Stephen Adams, Debra Bolhuis, Marcia Brizendine, Kevin Cliburn, Jason Hand, Daniel Harris, Bob LaRoche, Angela Perry, Casey Price, Kaylene Riemen, Laura Robbins, Bobbi Satterfield, Staci Somers, Donna Wright | ||
| Indexer | Chris Wilcox | ||
Kate Gregory is a
founding partner of Gregory Consulting Limited (
Paul Kimmel is the
author of Building Delphi
2 Database Applications and Using
Borland C++ 5 also from Que. He is the president of the
Okemos, Michigan-based Software Conceptions, Inc. which offers
software developer training and custom application development
around the world. In the mid-Michigan area, we offer training
at our partners-in-training location, Automation Resource Corporation
founded by Janice Szur. Software Conceptions can be reached at
[email protected]
or CompuServe at 70353,2711.
Paul is the father of three boys: Trevor, Douglas, Noah, and a
girl, Alex, and loving husband to Lori.
Clayton Walnum, who
has a degree in Computer Science, has been writing about computers
for almost 15 years and has published hundreds of articles in
major computer publications. He is also the author of over 25
books, which cover such diverse topics as programming, computer
gaming, and application programs. His most recent book is Windows
95 Game SDK Strategy Guide, also published by Que. His
other titles include the award-winning Building
Windows 95 Applications with Visual Basic (Que); 3-D
Graphics Programming with OpenGL (Que); Borland
C++ 4.x Tips, Tricks, and Traps (Que); Turbo
C++ for Rookies (Que);
Dungeons of Discovery (Que); PC
Picasso: A Child's Computer Drawing Kit (Sams);
Powermonger: The Official
Strategy Guide (Prima); DataMania:
A Child's Computer Organizer (Alpha Kids); Adventures
in Artificial Life (Que); and C-manship
Complete (Taylor Ridge Books). Mr. Walnum lives in Connecticut
with his wife Lynn and their four children: Christopher, Justin,
Stephen, and Caitlynn.
Kate Gregory: To
my husband, Brian, and my wonderful children, Beth and Kevin,
my heartfelt thanks once again for all the understanding and support.
My neglected family and friends have also earned my gratitude,
by not complaining too loudly about my absences from their lives.
Writing a book takes a team effort and this one is no exception.
My coauthors, technical editors, and illustrators all deserve
to share the credit for the good things you see here. The mistakes
and omissions I have to claim as mine alone. To Fred Slone, Angela
Kozlowski, Matthew Cox, and the other terrific Que people who
made this happen, thank you for doing such a great job. Special
thanks go out to those readers of my earlier books who took the
time to send me email with questions, corrections, and suggestions:
you have helped this book to exist, because without readers, writers
cannot write. Keep up the good work!
As part of our continuing effort to produce books of the highest
possible quality, Que would like to hear your comments. To stay
competitive, we really
want you, as a computer book reader and user, to let us know what
you like or dislike most about this book or other Que products.
You can mail comments, ideas, or suggestions for improving future
editions to the address below, or send us a fax at (317) 581-4663.
Our staff and authors are available for questions and comments
through our Internet site, at http://www.mcp.com/que,
and Macmillan Computer Publishing also has a forum on CompuServe
(type GO QUEBOOKS
at any prompt).
In addition to exploring our forum, please feel free to contact
me personally to discuss your opinions of this book: I'm
[email protected]
on the Internet.
Thanks in advanceóyour comments will help us to continue
publishing the best books available on new computer technologies
in today's market.
Visual C++ is a powerful and complex tool for building 32-bit
applications for Window 95 and Windows NT. These applications
are far larger and more complex than their predecessors for 16-bit
Windows, or older programs that did not use a graphical user interface.
Yet as program size and complexity have grown, programmer effort
has actually decreased, at least for programmers who are using
the right tools.
Visual C++ is one of the right tools. With its code-generating
Wizards it can produce the shell of a working Windows application
in seconds. The class library included with Visual C++, the Microsoft
Foundation Classes, has become the industry standard for Windows
software development in a variety of C++ compilers. The visual
editing tools make layout of menus and dialogs a snap. The time
you invest in learning to use this product will pay itself back
on your first Windows programming project.
This book will teach you how to use Visual C++ to build 32-bit
Windows applications, including database applications, Internet
applications, and applications that tap the power of the ActiveX
technology. That's a tall order, and to fit all that in less than
a thousand pages, some things had to go. This book will not
teach you:
You will need a copy of Visual C++ 4.2, and need to have it installed.
The installation process is simple and easy to follow, so it's
not covered in this book.
Before you buy Visual C++ 4.2, you'll need a 32-bit Windows operating
system: Either Windows 95 or Windows NT Server or Workstation.
That means your machine will have to be reasonably powerful and
modern: Let's say a 486 or better for your processor, at least
16 MB of RAM and 500 MB of disk space, and a screen that can do
800 ´ 600 pixel displays, or even finer resolutions. The
illustrations in this book were all prepared at a resolution of
800 ´ 600, and as you'll see, there are times when things
get a little crowded.
Finally, you need to make a resolution: That you will follow along
as you go, clicking and typing and trying things out. You don't
need to type all the code if you don't want to: It's all on the
CD-ROM for you to look at. But you should be ready to open the
files and look at the code as you go.
One thing this book has plenty of is code. Sometimes, we just
need to show you a line or two, so we mix it in with the text
like this:
You can tell the difference between code and regular text by the
fonts we use for each of them. Sometimes, we need to discuss a
piece of code that is too large to mix in with the text: you'll
find an example in Listing 1.
The character on the second last line (›) is called the
code continuation character. It shows a place where we had to
break a line of code to fit it on the page, but the line is not
broken there in reality. If you're typing code in from the book,
don't break the line there, just keep going. If you're reading
along in the code from the CD-ROM, don't get confused when the
line doesn't break there.
Remember, the code is in the book so that you can understand what
is going on, not for you to type in. All the code is on the CD-ROM
as well. Sometimes, we'll work our way through the development
of an application and show several versions of a block of code
as we go-the final version is on the CD-ROM.
When a word is in italic, like the word italic just was,
it's usually being defined. (Sometimes we're just emphasizing
it.) The names of variables, functions, C++ classes, and things
you should type are all in monospaced font. Internet
URLs are in bold type. Remember, a URL never ends with punctuation,
so ignore any comma or period after the URL.
That just about wraps things up for the introduction. We've told
you what you need to get started, and given you some advanced
warning about the notations we use throughout the book-now it's
your turn. Jump right in, learn all about writing Windows applications
with MFC, and then get started on some development of your own!
Good luck and have fun.
Acknowledgments
We'd Like to Hear from You!
Angela Kozlowski
Product Director
Que Corporation
201 W. 103rd Street
Indianapolis, Indiana 46290
USA
Introduction
Who Should Read This Book?
Before You Start Reading
Conventions Used in This Book
int SomeFunction( int x, int y);
{
return x+y;
}
Listing I.1
CHostDialog dialog(m_pMainWnd);
if (dialog.DoModal() == IDOK)
{
AppSocket = new CSocket();
if (AppSocket->Connect(dialog.m_hostname,119))
{
while (AppSocket->GetStatus() == CONNECTING)
{
YieldControl();
}
if (AppSocket->GetStatus() == CONNECTED)
{
CString response = AppSocket->GetLine();
SocketAvailable = TRUE;
}
}
}
if (!SocketAvailable)
{
AfxMessageBox("Can't connect to server. Please
›;quit.",MB_OK|MB_ICONSTOP);
}
TIP
This is a Tip: A shortcut or interesting feature you might want to know about.
NOTE
This is a Note: It covers a subtle but important point. Don't skip notes even if you're the kind who skips tips.
CAUTION
This is a caution, and it's serious. It warns you of horrible consequences if you make a false step, so be sure to read all of these that you come across
TROUBLESHOOTING
Everyone runs into problems now and then while programming. We've anticipated some of them-and we discuss how to get out of whatever trouble you're in.
Time to Get Started
