Please i have to do the lesson 30 in delphi... Does anyone has already done it ? Please help me !! I get so many problems...

Lesson 30? The one about collision detection?

Some of the other lesson have already been ported to Delphi, and I don''t think that lesson contains anything that would make it especially hard to port. Have you tried looking at some of the other Delphi ports? Maybe they could be used as inspiration (seeing that NeHe lessons usually have a lot of code in common).

Maybe if you could be a bit more specific about what''s causing the problems, I could try to give a hand?