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Painless Legacy FoxPro Applications on Modern Networks (ebook only)
Table of Contents


Chapter 1: Who This Book is for and What You Need to Bring
Do you need to install or maintain legacy FoxPro for MS-DOS and Windows applications on today’s Microsoft and Novell networks? Do you need to get them set up, running, sharing data, and printing without headaches? Do you want to know the tricks and tips involved? If you do, this book is for you.

Some things to keep in mind
A brief history of FoxPro on the PC
A brief overview of MS-DOS and Windows
16-bit and 32-bit operating systems
The Windows API

Chapter 2: How Windows Runs FoxPro
I showed you how Windows is split into two codebases–the Windows 95 Kernel and the Windows NT kernel. Now look at how those kernels provide support for legacy applications like FoxPro–and some of the problems that can occur.

An overview of how MS-DOS and Win16 applications run in the Windows 95 kernel
Windows core components
User
Graphical Device Interface (GDI)
Kernel
Other Components
Virtual Machine Manager
An overview of how MS-DOS and Win16 applications run in the Windows NT kernel
Kernel Mode
User Mode
The MS-DOS NTVDM
WOW–Win16 on Win32

Chapter 3: Configuring FoxPro and Windows
Back in the day when we only had MS-DOS and Windows 3.1, people had to spend large amounts of time tweaking both the operating system and FoxPro so they would work together. With FoxPro applications running on emulated DOS machines these days, does this mean we still have to worry about things like file handles and MEMMAKER?

The AUTOEXEC and CONFIG files and what they do
Editing the files in Windows 95/98
Editing the files in Windows ME
Editing the files in Windows NT/2000/XP
The AUTOEXEC.BAT/NT file
The CONFIG.SYS/NT file
What happens under Windows Millennium Edition?
Environment variables and other AUTOEXEC.BAT items
Settings in CONFIG.SYS
The CONFIG.FP and CONFIG.FPW files
MVCOUNT, MEMLIMIT, PROGWORK, EDITWORK, SORTWORK and TMPFILES
FoxPro for DOS Memory Considerations
FoxPro for Windows memory considerations
MS-DOS Paths, SET PATH and SET DEFAULT

Chapter 4: Networks—How to Survive Them
Many legacy FoxPro database applications are intended to run in a shared network environment. The many combinations of network Operating System, client Operating Systems, and network hardware provide many opportunities for problems to occur. In this chapter, I look at some preventative measures to take in network configuration and some troubleshooting steps for when things go wrong.

How FoxPro applications run “over a network”
Problems with file access
Opportunistic Locking
Anti-virus software, data access, and speed problems
Novell networks and clients
Data corruption problems with the Novell Client
UNC paths and the NET command
How to determine computer name and shared resources
How to map network drives and printers on Windows Networks
The foolproof method
How to map network drives and printers on Novell networks
Methods for running networked FoxPro applications
Network protocols
NetBEUI
Binding Order
Common Miscellaneous Networking Problems
The ‘Unable To Process Error’ error message

Chapter 5: Printers and How to Make Them See Things Your Way
Printing from legacy FoxPro applications is an area people can have severe problems. It can be very frustrating when someone has spent a lot of money on a big new networked laser printer only to find the legacy FoxPro-based payroll package can’t print to it.

How FoxPro prints in general terms
Printing to dot matrix printers in FoxPro for DOS
Printing to dot matrix printers in FoxPro for Windows—using “Windows-Type Printing”
Printing to dot matrix printers in FoxPro for Windows—using “DOS-Type Printing”
Printing to laser/inkjet printers in FoxPro for DOS
Printing to laser/inkjet printers in FoxPro for Windows—using “Windows-Type Printing”
Printing to laser/inkjet printers in FoxPro for Windows—using “DOS-Type Printing”
Other ways of printing from FoxPro
Printing to serial devices
The various types of printers and their suitability
More network printing
Miscellaneous printing issues
Port problems and disappearing print jobs with shared printers under Windows NT/2000/XP
Strange occurrences with early Hewlett-Packard PCL6 drivers
Problems printing to LPT1 on Windows NT/2000/XP workstations
Errors writing to LPT1, incomplete pages or printing does not start until an application is exited under Windows NT/2000/XP
Novell NDPS printing
Three real-world examples

Chapter 6: Thin Client
If you were involved in computing before the PC boom of the early 1990’s, then the words ‘dumb terminal’ either create a warm, nostalgic glow in your heart or more likely fill it with dread. All these years later, the industry is starting to come full circle as people realize there are benefits to having computing power centralized and using simpler terminals as opposed to each user having a Pentium 4 workstation and not using a fraction of its power. Enter Terminal Services and Citrix.

The Theory of thin client on Windows networks
The history of thin client on Windows Networks
FoxPro on thin client
Server memory and CPU considerations
FoxPro for Windows Screen Redraw Speed
FoxPro for DOS CPU usage considerations
Access to client devices
Printing

Chapter 7: Miscellany
In this final chapter I run through some miscellaneous issues that can arise and didn’t fit in anywhere else. Also, I list what I think are the best online resources to get help with problems you encounter when running legacy FoxPro applications.

Error 15 (Not A Table/DBF) and Error 41 (Memo File Is Missing Or Invalid)
Problems caused by corruption of indexes or other files
Watcom Win386 Read error
Fatal Exception Errors in SYMEVNT
Device Does Not Exist On Network error
Problems Printing To LPT1 on Windows NT/2000/XP
The Big One–Division By Zero Error In FOXW2600.ESL starting FoxPro for Windows on modern platforms
“Cannot Read From Drive” or “Device I/O” errors
Useful Resources