procedure InternalOpen; virtual; abstract;
virtual void __fastcall InternalOpen() = 0 ;
Initializes and opens the data stream.
InternalOpen is used to open the stream that holds the data. The method is abstract, so every TDataSet descendant must implement it in its specific way to initialize and open the data stream and also to connect the dataset to TFields objects. The method should call InternalInitFieldDefs to determine the field definitions.