Hi ; Can you please tell me that how to create an app on facebook, and also provide me any link by using that i can design my page easily. Thanks in advance.
It seems impossible to create App with new FB accounts at present, you can try to create App with aged PVA accounts. The App creation URL: http://apps.facebook.com/applicationbuilderl
You will need to learn a programming language of your choice. I would suggest php. You will also need to learn the fb graph api. You can read blogs or online tutorials for both. PM me if you need any further info.
Try it: http://apps.facebook.com/dailyblogworld/ free Apps to create landing page on Facebook from your blog/site feed
You can use wordpress to make the actual app, using a special theme as featured in the URL http://fbfanpagepress.com/ BUT THERE IS A FREE ONE OUT THERE THAT'S BETTER... I'll get the URL later... No, I'm not an affiliate of that site, so please don't buy that theme...
But yea, like most people have already stated here, develope.facebook.com is the place to start for sure...
Search on google for tutorials to get started. If you know php and javascript, it should not be a big deal to develop fb apps.