September1999

The LA Fox Developer Newsletter

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.

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

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.

2210 Wilshire Blvd. -#161

Santa Monica, CA 90403

OC FoxPro Developers Group

Membership/Subscription

The annual membership fee for the LA Fox Developers Group, including subscription to The LA Fox Developer Newsletter, is $48.

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 considered, 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 respective 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.

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

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.