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Arthur Hefti

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Top Stories by Arthur Hefti

Prognos is an application used over the Internet to determine if it makes sense to apply for a scholarship. It's part of a program package used in a couple of cantons (the equivalent of a state in the U.S.) in Switzerland to manage applications for a scholarship. The current version runs with DataWindow.NET 2.0 and uses PowerBuilder 11 Web Services. To keep the installation slim it uses no database; instead the data is stored in DataWindows or XML files. Prognos makes use of AJAX techniques and accesses .NET classes from PowerBuilder for XML handling. Since it's used in Switzerland (which has four official languages: German, French, Italian, and Romansh) it's multilingual. Initial Version We developed the first version of Prognos with DataWindow.NET 1.5 using ASP.NET with C#. Our partner company implemented the calculation for a possible scholarship in a PowerBuilde... (more)

PowerBuilder - The ClassDefinition Object

In the first article we presented a some theories about the ClassDefinition object and were able to show the libraries of a PB application in a treeview control. This month we'll read the objects from the libraries and inspect their content. When a user expands an entry in the treeview, we check to see if it was expanded once already. If it was, we don't take any action. We code this in the itemexpanding event of the treeview control, where we get the clicked treeviewitem by calling This.GetItem. If it wasn't expanded already, we check to see if the level of the treeviewitem is... (more)

"Plug-in Power for PowerBuilder Applications" im ISUG Journal Erschienen

PBDJ Blog Post Der Artikel von Arthur Hefti "Plug-in Power for PowerBuilder Applications" ist in der Publikation der ISUG (International Sybase User Group) erschienen. Der Artikel zeigt wie EnableRex über Plug-ins erweitert werden kann. Als Beispiel der Integration dient die CATsoftPDF (DataWindow nach PDF Converter) Library. Die Ausgabe September - Dezember 2009 ist eine Doppelausgabe und kann als ISUG Mitglied gelesen werden. ... (more)

Encryption in PowerBuilder

Keeping information away from curious eyes is a challenging task. For example, you might need to encrypt data before sending it over the Internet. Or you might be storing some information in a database that not even an administrator is allowed to see. This article provides a brief overview of encryption techniques and shows how to do encryption in PowerBuilder. Short History Encryption goes as far back as ancient Egypt. In 1900 B.C. the Egyptians used a derivation of standard hieroglyphics to make a message more difficult to read. The art of hiding messages improved over the centu... (more)

The ClassDefinition Object

The ClassDefinition object was introduced in PowerBuilder 6.0 a long time ago. It allows you to retrieve information for an object at runtime. Most of us didn't pay too much attention to this object and it only attracts our attention when we see it in the debugger. In this article I provide an overview of the ClassDefinition object and related objects and explain the most important properties of these objects. I also include a step-by-step guide on how to build a simple object browser. This browser has a limited functionality like the browser included in the PowerBuilder runtime... (more)