Question on delphi/400

I've been working with delphi for quite a while, now i changed to a company
that works with AS400 and writes aplications in RPG.
Anyway, i know that delphi uses RPG programs, but how does it deals with
the programs that uses SDA screens and menus ?  can they be converted ?

thanks in advance    

R.G.
rui.goncal...@mail.telepac.pt