Erweiterte Methoden für die Integration mehrerer Server

   PROCEDURE OpenS(  VAR box: MessageBox;
                     server,
                     name, password: ARRAY OF CHAR): BOOLEAN;

   PROCEDURE SendS(  msg: Message;
                     server, to: ARRAY OF CHAR): BOOLEAN;

   PROCEDURE UsersS( server: ARRAY OF CHAR; VAR list: UserList);

   PROCEDURE KnownS( server, user: ARRAY OF CHAR): BOOLEAN;

   PROCEDURE Default(server: ARRAY OF CHAR);