Converting Data Not Supported by the Provider
When the consumer requests a data type that is not supported by the provider, the OLE DB provider template code for IRowsetImpl::GetData calls Msdadc.dll to convert the data type.
If you implement an interface like IRowsetChange that requires data conversion, you can call Msdaenum.dll to do the conversion. Use GetData, defined in Atldb.h, as an example.