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These pages will give you some advice on how to solve some
specific problems.
We have made various sections for your convenience.
Operating System related
VDF running as a Windows NT Service
Create autologon in Windows NT
Logon keyboard layout
Basic TCP-IP in a Word
MS SBS Limitations
Explanation regarding opportunistic locking
Citrix and Visual DataFlex
General
Retrieve disappeared objects
Write a DWord to the registry
Prevent Status panels losing the focus
Create a header-detail construction
Date-masking problems
Migrate legacy process code for use in a BPO
Create a multilingual application
Multi-homed system in MS SQL Server
Migrating 2.3 code towards DF3.1
Autolocated panels that get covered by the windows taskbar
Batch processing guidelines
dbList class unmystified
Retain in VDF
Create dynamic masks in VDF
| VDF running as a Windows NT Service | Author: Frank Vandervelpen |
| Date: 09-20-1999 | Company: Velpe Development |
| Description: This document explains you step by step how to set up a Windows NT machine so that it is able to run a VDF application as a NT service. This means that the application will automatically run after the system is booted. The VDF application will run even without a logon. | |
| Create autologon in Windows NT | Author: Wil van Antwerpen |
| Date: 09-20-1999 | Company: Antwise Solutions |
| Description: Steps on how to let your Windows NT station automatically login with a default username and password. | |
| Logon keyboard layout | Author: Frank Vandervelpen |
| Date: 01-19-1999 | Company: Velpe Development |
| Description: This document explains you how to change the keyboard layout at logon. This way you can use a non-US Keyboard. | |
| Basic TCP-IP in a Word | Author: Frank Vandervelpen |
| Date: 09-20-1999 | Company: Velpe Development |
| Description: Some very basic TCP/IP documentation | |
| MS SBS Limitations | Author: Frank Vandervelpen |
| Date: 09-20-1999 | Company: Velpe Development |
| Description: Limitations of Micosoft's Small Business Server. | |
| Explanation regarding opportunistic locking | Author: Frank Vandervelpen |
| Date: 09-27-1999 | Company: Velpe Development |
| Description: An explanation about what really happens with opportunistic locking | |
| Citrix and Visual DataFlex | Author: Filip Huwaert |
| Date: 12-08-1999 | Company: Soft-Naert |
| Description: A paper about Citrix Metaframe and how to use it with Visual DataFlex. | |
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| Retrieve disappeared objects | Author: Wil van Antwerpen |
| Date: 09-20-1999 | Company: Antwise Solutions |
| Description: A tabpage in VDF sometimes looses one or more of its objects. This usually happens after a user clears the entire view. This document describes how to display those dreaded objects again. | |
| Write a DWord to the registry | Author: Frank Vandervelpen |
| Date: 09-20-1999 | Company: Velpe Development |
| Description: Normally if you write a value to the registry, it will be a string value. This document tells you how to write a DWord value. | |
| Prevent Status Panels losing the focus | Author: Geoff Furlong |
| Date: 10-03-1999, 10-20-1999 | Company: MSG Business Systems Ltd. |
| Description: The status panel for BPOs and Winprint will lose its focus as soon as he switches to other applications and comes back. Thr result of this is that it looks like that the application has locked up while it is in fact still running the report or business code. Here is a fix for the problem. | |
| Create a header-detail construction | Author: Frank Vandervelpen |
| Date: 09-13-1999 | Company: Velpe Development |
| Description: Frank has written some general guidelines on creating a basic header-detail construction in VDF | |
| Date masking problems | Author: Wil |
| Date: 09-13-1999 | Company: |
| Description: There are some serious problems when using date masks in vdf. | |
| Migrate legacy process code for use in a BPO | FTP | Author: Dan Walsh |
| Date: 10-15-1999 | Size: 12 KB (zip) | Company: Legal Software Development |
| Description: This paper discusses several different ways on how to migrate your old procedural process code to a BPO. Examples are included. | ||
| Create a multilingual application | FTP | Author: Pete Mustoe |
| Date: 10-20-1999 | Size: 80 KB (zip) | Company: Focustree Ltd. |
| Description: The zip-file contains a Word97
document and a password package on how I implemented a top level function in VDF for
multi-language changes for ALL visual objects. The database fields label naming is
performed by using the method explained in the final chapter of the "Mastering
Visual Dataflex" book (not published in here). If these 2 methods are adopted a full language translation facility can be included in ALL your VDF applications, with very little code. |
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| Multi-homed system in MS SQL Server | Author: Frank Vandervelpen |
| Date: 11-17-1999 | Company: Demasoft |
| Description: This Whitepaper discribes a way to tackle the problem that arises when you want to convert a multi-homed DataFlex database to MS SQL Server. With multi-homed we mean a database with shared datafiles in one directory and specific company-related datafiles in their own seperate directory. | |
| Panel gets covered by windows taskbar | Author: Wil van Antwerpen |
| Date: 03-09-2000 | Company: Antwise Solutions |
| Description: This article explains you how to fix the problem that occurs for instance if you have a view with a dbform object and a selectionlists near the bottom of the screen. Popping up the selectionlist will locate the panel so that the buttons are beneath the windows taskbar. | |
| Migrating 2.3 code towards DF3.1 | Author: Frank Vandervelpen |
| Date: 02-16-2000 | Company: Oryx N.V. |
| Description: This Whitepaper describes some of the problems that you can expect to see if you migrate your code from DataFlex release 2.3 to DataFlex 3.1 | |
| Batch processing guidelines | FTP | Author: Pete Donovan |
| Date: 06-11-2000 | Size: 346 Kb (zip) | Company: Stark Data |
| Description: This discusses the use of BPOs for
updating files. The zip-file contains a Word document together with some great package and an example showing how to change ID keyfields. You can view the whitepaper here. |
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| The dbList class unmystified | FTP | Author: Wil van Antwerpen |
| Date: 07-04-2000 | Size: 128 Kb (zip) | Company: Antwise Solutions |
| Description: This whitepaper is about the inner workings of the dbList class. Understanding what happens when you press a button that invokes a lookup can help in customizing this class to your wishes. An online version of the paper is here | ||
| Retain in VDF | Author: Peter Bosch | |
| Date: 10-27-2000 | Company: info trans Logistik Systems GmbH |
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| Description: Do you remember the item_option retain from console mode DataFlex? This is not a supported technique anymore in VDF, until now! This whitepaper describes to you how you can still make use of the retain field_option in VDF (DD_RETAIN) by adding a few lines of code to your subclass structure. | ||
| Dynamic Masking in VDF | Author: Ivan Larrondo V. | |
| Date: 11-21-2000 | ||
| Description: Changing masks dynamically is not supported in Visual DataFlex. As usual you can still do this once you know the trick. Ivan shows you how to do this easily. | ||
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