The Crystal Data Source Type Library, like Crystal Data Objects, provides a means for designing customized data sources that can be reported off of using the Active Data Driver. Crystal Data Source, however, unlike CDO, is a type library with an interface that can be implemented in a standard Visual Basic class. Once implemented, the Crystal Data Source interface allows your data to be fully manipulated much like a standard Recordset object in ADO or DAO.
Note: The Crystal Data Source type library is designed for Visual Basic 5.0 or later.
If you simply need a quick means for packaging some data in a form that can easily be reported off of, you should consider using Crystal Data Objects. Crystal Data Source, on the other hand, is designed for developers who need more flexibility when working with custom data sources. Keep in mind, though, once you add the Crystal Data Source interface to your class, you must implement all methods and properties exposed by the interface.
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