Is there a fingerprint reader+scanner with api/sdk?

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VB

Windows

I need to Scan and read the users thumbsprint from my application.

What I really want is a simple SDK for window dependable application that works with a lot of inexpensive fingerprint readers but I can deal with something that works only with one specific model if that model is cheap and available worldwide.

And it has to be royalty-free, I can pay for a development license but if I have to pay for each installation I just can't use it.

What I'm doing has no relation to login or encryption, so the software included with the reader will probably be useless to me.