If you buy the Developer CD 2.1 you will get StormC 3, it has a nicer GUI, but don't fancy about creating GUIs as easily as you may do with VisualC++...
Anyway you should check out GadToolBox, MUIBuilder and Emperor.
I know that there are some IDEs for Gcc & SAS/C but I can't remember the names... search in aminet it isn't difficult to find them.
If I were you I would start opening windows, screens, ASL requesters for the screens... then hwen you are used to AmigaOS a little, check out GUI Builders like GadToolBox (I would use it firstly).
