Header File: edbcomps

typedef void __fastcall (__closure
      *TEDBServerSessionLoginEvent)(System::TObject* Sender, const
      System::UnicodeString UserName, const System::UnicodeString
      UserPassword, const System::UnicodeString Address, const
      System::UnicodeString ProcessName, int ThreadID,
      System::Currency ReleaseNumber, int BuildNumber, bool
      &AllowLogin)

This type is used for the TEDBEngine OnServerSessionLoginEvent event.