Report Designer Component (RDC)

The RDC—introduced in June 1998 as a component of Crystal Reports—represents a major reengineering of the Crystal Report Print Engine. Unlike any of its predecessors, the RDC is not a wrapper; it exposes all Report Engine objects directly without any translation. The RDC is based on the same object model as the Crystal Report Automation Server. Because it is not a wrapper, the RDC is a much more efficient COM object that supports features such as dual interface, providing a more efficient way of making calls to the Report Engine.

The primary advantage of using the RDC over other developer tools within Crystal Reports is its code writing and formatting capabilities in popular development environments such as Visual Basic. The RDC provides events that enable you to manipulate the report at runtime. Within these event handlers, you can access text or field objects to modify the output of a report based on user input. Setting text in text objects or field objects, or dynamically changing pictures in picture objects, are added features unique to this interface.



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