Am 29.11.2012 22:36, schrieb Hans-Peter Diettrich: > FPC has added "constref", definitely forcing by-ref. AFAIR this was > required for the ObjectiveC interface. No, it wasn't added for Objective C, but for XPCOM, which provides COM on non-Windows plattforms (X(Cross) Plattform Component Object Model). Regards, Sven