Facebook Graph API integration

Question

Hi , i am actually wants to fetch comments against a post on my facebook account using graph API, i have gothrough all the documentation of graph API from "facebook developers"(https://developers.facebook.com/docs/graph-api/overview) structure of API is cristle clear, but i am little bit confuse about athentication and integration of API with my application, as well code for how i will fetch an object. thanx in advance