The IPersistStreamInit interface is a standard Win32® OLE interface. This interface is typically implemented on any object that needs to support initialized stream-based persistence, regardless of whatever else the object does. In the context of the order processing pipeline (OPP), it is used to load/save the component configuration in the pipeline configuration file (the pipeline will call on this interface as appropriate). For information about IPersistStreamInit, see the OLE Programmer's Reference.