Er... I think it does work and I see from this forum and the discussion forum that its working on some other people's 'puters.
Also a "Big Up" and "Respect" to Andrew11 and The_Winch for:
a. managing to beat it (never spotted that one Andrew11 - well done!)
b. fixing that, er, bug (good bit of code there The_Winch)
respectively.
Now I am going onto something much, much more ambitious. I'm going to see if I can port Christian Pinder's Elite: TNK code from C/Allegro to DarkBasic Pro. If I can, then I'm going to make some fairly serious modifications to it so finally PC players will have an ArcElite-like experience.
Phil