I was roaming around the gimptalk forum when I saw this post: http://www.gimptalk.com/forum/topic/...ct-4172-1.html
After taking a look at these :
Roam around the examples and try playing with it around(you'll be facinated at first but bored after you play some time but just check out the source, you'll never be bored).
Just thought of sharing. Have fun guys.