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please give a reply as soon as possible
Here programmers will reply as per their time. So, don't be desperate when you ask any question. You need to wait for some time.
Coming to your problem, you have not described much about it.
You should mention which fingerprint bio-metric device you are using, so that if anyone have ever worked on that, then they can guide you.
But without less info, nobody can help you.
As as per Sudhakar Shinde, the best way to start is to to contact the developers or support forums of that device to know how exactly you can consume that in your application. They are the best people to guide you.
Happy Coding... :)