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Applies To: SQL Server 2016 Preview

OLE/COM objects report errors through the HRESULT return code of object member functions. An OLE/COM HRESULT is a bit-packed structure. OLE provides macros that dereference structure members.

OLE/COM specifies the IErrorInfo interface. The interface exposes methods such as GetDescription. This allows clients to extract error details from OLE/COM servers. OLE DB extends IErrorInfo to support the return of multiple error information packets on a single-member function execution.

SQL Server can return multiple errors. An application can retrieve server errors one at a time by calling IMultipleResults::GetResult combined with ISQLErrorInfo and IErrorRecords.

The SQL Server Native Client OLE DB provider exposes the OLE DB record-enhanced IErrorInfo, the custom ISQLErrorInfo, and the provider-specific ISQLServerErrorInfo error object interfaces.

For information about tracing errors, see Data Access Tracing. For information about enhancements to error tracing added in SQL Server 2012, see Accessing Diagnostic Information in the Extended Events Log.

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