Well you can start reading up on this:
Windows SDK Bluetooth Reference
SDK Documentation for Windows Mobile-Based Smartphones
This is a general comment, as in not directed specifically to Tamal, who may for all I know be a brlliant architect and developer.
Since it seems quite clear that many of the questions asked here at Q&A could easily be solved by spending less than 5 minutes reading the documentation or just searching google - I feel like venting a bit of frustration.
As a developer you actually have to enjoy reading new material, literally tons of it during a career.
It's often required that you are willing to assimilate the minute details pertaining to a particular domain, often on a level surpassing domain specialists for the problem at hand – and then use your understanding and skills to solve it.
A developer can never take anything for granted, and you’ll often find that the obvious isn't so obvious, so acute observation skills come in handy too.
When in doubt use Google
, but if you don't mean it when you say you enjoy learning new things, find something else to do.
So please, when you ask a question, show us - who actually spend some effort on helping you, at no charge - some respect by spending a bit more effort on your questions, and if you are smart: Try to solve it yourselves.
We’ll be there, we’ll try to help you if you get stuck, we’ll even enjoy it if we can help you solve your problem.