Longhorn and Biometrics, Bis
I checked a bit what I can find in Longhorn concerning that Biometric stuff. And I found that it is BAPI: bapi.dll, . That specification was bought some long time ago from i/o software and I remember that it was planned to have this integrated in Windows XP. I think that Microsoft did not included it because the biometric technology was not ready at that time.
I know a bit more about BioAPI than BAPI, but at the end I think it works almost the same. There is also a Kernel Biometric Service Provider: kbsp.dll and a tool called biotool.exe permiting to enroll a new biometric credential:
ENROLL Enroll a new biometric credential.
sources (specific to each method):
RT Right Thumb (FP)<br> RI Right Index (FP)<br> RM Right Middle (FP)<br> RR Right Ring (FP)<br> RP Right Pinky (FP)<br> LT Left Thumb (FP)<br> LI Left Index (FP)<br> LM Left Middle (FP)<br> LR Left Ring (FP)<br> LP Left Pinky (FP)