PowerBuilder Tips, Tricks, and Techniques

Arthur Hefti

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Top Stories by Arthur Hefti

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 environment and can't replace products like PBLPeeper by Terry Voth or PBBrowser by OOWidgets. The ClassDefinition Object Hierarchy The classdefinitionobject is a descendant of the pbtocppobject. It's the ancestor of all the other objects used to describe the PowerBuilder objects. Each objec... (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)

Using PowerBuilder Assemblies in .NET

PBDJ Feature Story There's a lot of "legacy" PowerBuilder code that you might want to access from .NET applications or perhaps PowerBuilder has some superior functionality that you would like to make use of in a .NET application. Think about how easy it would be to create a report in PowerBuilder with a DataWindow. Of course, PB can provide functionality through Web Services (see my article "Prognos with DataWindow.NET 2.0 and PowerBuilder 11 Web Services" in PBDJ some time ago) but this has its limitations. In the article "PowerBuilder 11's .NET Interoperability" in PBDJ, John S... (more)

Artikel "Using PowerBuilder Assemblies in .NET" in PBDJ publiziert

Das PowerBuilder Developers Journal (PBDJ) hat heute den Artikel von Arthur "Using PowerBuilder Assemblies in .NET" online geschaltet. Der Artikel zeigt an einem Beispiel wie einfach PowerBuilder Code in .NET verwendet werden kann.  Dies ist eine Technik, die wir in Projekten einsetzen um bestehende PowerBuilder Logik weiter zu verwenden bzw. in PowerBuilder und in .NET Projekten gleichzeitig zu verwenden. ... (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)