The Crystal Data Source Type Library is a COM interface type library that can be implemented in your own Visual Basic classes. One the interface has been added to a class, you must implement every method and property defined by the interface. This process requires extensive Visual Basic coding, but the result is a complete data source that can be used much like other ActiveX data sources such as ADO or DAO. Additionally, a data source defined using the Crystal Data Source Type Library can be passed to report files at runtime through the Grid Controls and the Crystal Report Engine, allowing dynamic runtime reporting on powerful customized data sources.
Possible uses for data sources defined using the Crystal Data Source Type Library are ActiveX style data sources, similar to ADO, DAO, and RDO, Business Objects and business rules components, Microsoft Transaction Server components, or instrumentation systems that produce dynamic real
Note that as a type library, the Crystal Data Source Type Library does not actually provide any functionality on its own. You must determine the actual functionality by implementing each of the properties and methods defined in the type library interface. The descriptions given here of the CRDataSource object, its properties, and its methods are intended as a guideline for the type of functionality you should define in your own classes.
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