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Applies to: 
SQL Server
Enables tracing of API calls for all the SQL Server Express LocalDB instances owned by the current Windows user.
Header file: msoledbsql.h
Syntax
HRESULT LocalDBStartTracing();
Returns
S_OK: The function succeeded.
| Error | Description |
|---|---|
| LOCALDB_ERROR_XEVENT_FAILED | Failed to start XEvent engine within the LocalDB Instance API. |
| LOCALDB_ERROR_INTERNAL_ERROR | An unexpected error occurred. See the event log for details. |
Remarks
For a code sample that uses LocalDB API, see SQL Server Express LocalDB reference.