The LA Fox Developer Newsletter

Septemer 1999

The LA Fox Developer is the monthly newsletter of

the LA Fox Developers Group. The purpose is

information sharing among application developers

and users working with FoxPro.

L A Ftw Address

LA Fox

Barry R. Lee

714/375-3300

P.O. Box 6624

Huntington Beach, CA 92615-6624

LA Fox Board of Directors

Barry R. Lee, President/Newsletter Editor

Bill Anderson, Vice President/Programs

Twila Miller, Treasurer/Membership

Jonathan Melvin

Wayne Stahnke

David Salson

Mike Cummings

Michael Meer

George Porter

LA Fox is the oldest FoxPro developer’s group in

Southern California. The newsletter contains regular

columns as well as articles from other user groups.

XPro User Group

Randy Unruh

310/399-9159

2210 Wilshire Blvd. -#161

Santa Monica, CA 90403

OC FoxPro Developers Group

Mike Vincent

(714)970-9147

Membership/Subscription

The annual membership fee for the LA Fox Develop-

ers Group, including subscription to The LA Fox

Developer Newsletter, is $48.

Disclaimer

Neither the LA Fox User Group, the XPro User

Group, the OC FoxPro Developers Group, their

officers or board of directors or their members make

any express or implied warranties of any kind with

regard to any information disseminated, including,

but not limited to, warranties of merchantability and/

or fitness for a particular purpose.

Opinions provided by newsletter articles, or by

speakers, members, or guests who address the

meetings, are individual opinions only, and do not

necessarily represent the opinions of the group. All

opinions and information should be carefully consid-

ered, and the group is not liable for any incident or

consequential damages in connection with, or arising

out of, the furnishing or use of any information or

opinions. Brand names and product names may be

trademarks or registered trademarks of their respec-

tive owners.

Out and About (Con't from Page 1)

VFE DevCon, September 19-22, 1999, Monte Carlo, Las Vegas, NV.

That’s right, it’s happening again. Fl Technologies is pleased to announce

that it will be hosting the 5th almost annual Visual FoxExpress Developers

Conference. The annual Visual FoxExpress developers conference has

long been the premier third party application development tool event. This

year they’ve teamed up with Markus Egger of EPS Software and Rick

Strahl of West-Wind Technologes to bring you an event like no other - The

Visual FoxExpress Mega Double Impact Extreme DevCon! This one-of-a -

kind event focuses on the hottest Visual FoxPro application development

techniques including OOP, COM, DCOM, XML, DHTML and more, as well

as using best-of-breed tools such as Visual FoxExpress, Web Connection

and Visual WebBuilder for creating desktop, client-server, n-tier and

Internet/I ntranet applications. You can register for both events for just

$1099, the Visual FoxExpress Developers Conference from Sunday —

Wednesday for $599 or the Mega Double Impact Event from Wednesday to

Sunday is also just $599. For more info, visit Fl’s website at http:ll

www.f1tech.com.

Since We Last Met

Micro Endeavors, Inc. (MEl) is considering coming out to Southern

California with their VF605 hands-on class for a week in December. In an

e-mail received from George DeLuca, the “605” class is “. ..a five day

course and is an accelerated version of VF603: Application Development 1

and VF604: Application Development 2. This fast-paced course takes the

FoxPro application developer from a single table multi-user form to a multi-

page, multi-table form. Given the quick pace, there is less time, fewer

exercises, and less discussion of the materials contained within the

manual. Prerequisites for the class include “A solia understanding of the

Visual FoxPro development environment and basic development syntax or

completion of the VF302, VF502 or VF602 self study. Suggested length of

Visual FoxPro development experience is a minimum of three months.”

Those interested in this class may contact George directly to express their

interest, GeorgeD©microendeavors.com, visit MEl’s website at http:ll

www.microendeavors.com, or phone (800) 331-9434 to register.

Limiting Simultaneous Users

by Craig Berntson

There are a number of ways to limit simultaneous users in your application.

Method I - Counter in a DBF

Create a control table and whenever a user launches your application, you

can increase a counter in the table. When they quit, you can decrease the

count. However, if someone simply turns off their PC, the counter won’t

decrease, so you need to provide a way to reset the counter.

Method 2 - Self Maintaining

In this method, you create a text file when the user logs in. If the next user

can open the text file, user one is no longer running the application and did

not log out properly. If user two cannot open the text file, then user one is

still using the application. You simply need to count the number of files that

could not be FOPENed to get the current number of users.

(Con’t, page 8)

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