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PowerBuilder® 9: Internet and Distributed Application Development by John D. Olson, Bill Green

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History of PowerBuilder Frameworks

PowerBuilder is a 4GL programming language that helps developers create business applications quickly. Although many companies have developed internal frameworks to help their development staff, several vendors have developed frameworks that incorporate PowerBuilder. PowerBuilder frameworks have evolved using a number of approaches. All these approaches have relied on code reuse, but the balance between inheritance and instantiation has varied significantly—and so have the results.

The early PowerBuilder frameworks focused on code reuse through inheritance (see Figure 14.1). This framework consisted of objects and windows with logic in the controls that determined processing. Common logic would be added to a ...

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