I'm a little new to GUI things, but I read about Webkit, Presto etc.. all these layout rendering things. How do they for example draw HTML etc. on my Windows form? Take Opera, I've this window form... all that flash, and images, text. Is that all GDI for example? Or have they created their own API for that? And that API, who does that talk to...? Maybe sounds super stupid everything, it just... I don't understand. I would really appreciate links to understand more about GUI things.. and rendering etc. Thank you!