PLz help me in Scanning Finger Print its Urgent plzzzz

I am an ex-Cross Match software engineer. Please post more details and if i can answer i will, otherwise I will pass the question on to one of my friends there.

I don't think anyone will be able to send you demo code for this, probably most people don't even know what these specific technologies have to allow for control.  My guess is there is either an API you'll need to write PInvokes for (dllimport) for each of the pieces or an activeX control that you can drag into .NET to control them.  A third possibility is that they can be controlled with either USB or through the Serial Port.   A serial port control  omes with .NET.  There are also USB solutions for .NET.  Beyond that, without more information on what software these things already come with, we can't help you.

So please when you post a question, give more detail on the existing technology and try to narrow the scope of your question, like "how do I send USB commands in .NET?" would be a good start.