Telling whether FS is in Full screen or just maximised

Hi,I'm currently in the final stages of developing some software for FS9/FSX, but one of the things that keeps bugging me is not being able to tell whether flight sim is in normal Maximised mode or Full Screen mode.Whenever you request the window mode in either state is just returns "SW_MAXIMIZE", so this isn't really a lot of help.I'm working in Delphi (Object Pascal) and communicating through FSUIPC.Any help would be most appreciated!!Thanks,Jags