Hi umairraja52....to check your backlinks in google, you need to use "link" operation like:- "link:yourdomainname".....or if you are using google webmaster tools, there go to "Your site on the web << Links to your site". This tab will give you detailed information about sites linking to you....
Each method and tool to find backlinks gives you different results. Webmaster tools provides you with overview of links, Link operator is a bit unreliable. Yahoo Site Explorer is pretty good for finding link opportunities from competitor websites.
Or get the seo developer bars and firefox extensions and youll have everything at hand!
Well, there are so many tool to check backlink but I always love to check through http://www.clearwebstats.com, infact not just a backlink you can see the all SEO details, including pagerank, major server engine backlink and so on on.. its a webmaster best tool if you able to use this.. .. :) have fun..