> In which DLL are the isc_action_svc_trace_* functions located? I am > planning to call it from a Lazarus project
As i already wrote, you should work with Services API. If you never works with it before i suggest to read IB6 "API Guide" https://www.firebirdsql.org/en/reference-manuals/ https://www.firebirdsql.org/en/reference-manuals/ and corresponding docs for Lazarus access components you used to work with Firebird. isc_action_svc_trace_* is not a functions exported from DLL. This is numeric constants (tags) used to work with Services API. Hope it helps, Vlad PS avoid overquoting, please
