how to access c++ com/activex files by using javascript ?

Question

hi 

How to read fingerprints by using com/activex controls in javascript only and

I have DPFPCtlX.dll, DPFPDevX.dll, DPFPEngX.dll, DPFPShrX.dll (c++  com/activex files ) 

by using using these .dll files in javascript how to get objects and how to do.

please send me sample examples based on my requirement