Any tutorial for creating simple overlays?

Well now that I have an iphone uikit / sdl integration I can live with for the gui.

I find myself needing to do some actual sdl coding.

I don’t see a lot of good reference material available.

Can anyone recommend any.

I know how to create butttons and overlays using opengl in a eaglview.

But how do I do it using sdl.

I want to create an overlay with some vcr style buttons something like the iphone’s media player has.

Any one recommend a good tutorial or sample.