Referring to the Facebook Documentation
When in doubt, look it up! Facebook has amazing references online to all its API materials. Whether simple API lookups or more in-depth library calls, Facebook provides documentation to take you every step of the way through the development process.
Perusing Developers.facebook.com for information
Developers.facebook.com (see Figure 1-6) should be your start for any information you want to find about Facebook APIs, tools, and libraries. Especially considering that Facebook changes this documentation frequently, this is a good place to start, because what may be the documentation today may be in a different location by the time you read this. Search around and get to know this place and what is available to you — and check back frequently.
Figure 1-6: Developers.facebook.com.

The Facebook documentation Web site
At the time of this writing, you could find all developer documentation for Facebook APIs, tools, and libraries at http://developers.facebook.com/docs. This may or may not be the correct URL by the time you read this, so be sure to search around if that's not the case. (I'll try to post new locations on my blog as well as my own Facebook page and this book's Facebook Page if things change. You can find the book's Facebook Page at http://facebook.com/dummiesbook.)
The Facebook Documentation page on Developers.facebook.com (see Fig-ure ...
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