[Haskell-cafe] FFI basics

Hi, I would like to use FFI for the first time. Can someone give me a really, really simple complete example? I want to be able to take a simple C program and access a function from it in Haskell. A simple example of the other way around would be nice, too, but I don't happen to need that just now. I started reading the Addendum, but that looks like it would be a lot easier to read if I saw a simple complete example first. Everything I found on the wiki seems way beyond that - maybe I missed it. I am using GHC. I am not using Windows. Thanks, Yitz