The PowerBuilder Foundation Class Library (PFC) is a set of PowerBuilder objects that are customized and used to develop class libraries. These objects can be used to provide corporate, departmental, or application consistency. PFC also includes objects that are used as is for utility purposes, such as debugging. PFC is written in PowerBuilder and delivered as PowerBuilder objects with supporting PowerScript source code. It uses advanced PowerBuilder object oriented coding techniques, and features a service-oriented design that ensures that an application uses the minimum amount of computer resources.
The library was initially developed by Powersoft and introduced when PowerBuilder 5 was released. The library was later open sourced by Sybase when PowerBuilder 10 was released. Since then a couple of forks have occurred, including one specifically to support the Appeon web enabling tool for PowerBuilder.