A probe into the reasons for the emergence of handle as 0x8009800c in Winbio

Recently in the fingerprint Identification program, invoke Microsoft provided WBF framework API, always appear unsupported operation, or appear handle as 0x8009800c

Checked MSDN, had been very depressed before, do not know why always appear this problem

Today, accidentally deleted the previously registered fingerprint, and then use the API provided by Microsoft to call the ENROLL function to register the fingerprint found registered success

Hope to give you a wake-up call before calling the function to see if you have registered a fingerprint, if the fingerprint has been registered, it may be fingerprint database has saved the information

Therefore, it is best to delete the previously registered fingerprint information and then call the function that captures or registers the fingerprint.

Also pay attention to whether the fingerprint recognizer supports capturing sample, for example, my Upek touchchip does not support caputuresample, and an unsupported operation occurs when called