Does anyone have any recommendations or good experiences with using any particular Biometric (fingerprint reader, smart card etc.) SDK in VFP?

Preferably with no runtime royalty...... I don't mind paying for developer licenses, but individual runtime licenses are generally unworkable given the license and deployment scheme we use for our own software products.

I am being asked to consider integrating login/transaction biometric security into our product(s).

Any suggestions are appreciated.

Thanks

Alec