This article aims at demystifying the steps to create a Facebook application. The app. creation is fairly simple but a complicated as far as configuration steps are concerned. Follow these steps and your app. will be up and running in 5 minutes.
Facebook app. is nothing but a page on facebook which actually shows a page from your OWN website inside an iFrame. This iFrame can have a width of maximum 520px.. Hence, you can show your content inside this 520px with no height limit. If the height is more than facebook page, it shows the scrool bars. [More]