MDAC 2.5 SDK - OLE DB Programmer's Reference
OLE DB Interfaces

ISQLErrorInfo

ISQLErrorInfo is used to return the SQLSTATE and native error code.

When to Implement

Providers for SQL databases can implement ISQLErrorInfo on custom error objects returned with the OLE DB error object.

When to Call

Consumers call the methods on ISQLErrorInfo to retrieve the SQLSTATE and native error code. To retrieve a custom error object, a consumer calls IErrorRecords::GetCustomErrorObject.