the hardware's SDK will provide you the necessary libraries and infos on how to interface your program with the biometric device...
Well in our case, we have a VB Program collecting raw longs in the biometric device, pass it to our MySQL Server, then process the raw logs into a much more understandable form... Schedule the program to execute every 1hr to collect raw logs from the device...
Saves you a lot of time working with the whole biometric program thing... But adventures of doin your own interface is quite a worth...