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What does WINBIO_CAPABILITY_VIRTUAL_SENSOR is for? RRS feed

  • Question

  • Hello,

    Documentation for WINBIO_SENSOR_ATTRIBUTES (https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/content/winbio_ioctl/ns-winbio_ioctl-_winbio_sensor_attributes)  mentions WINBIO_CAPABILITY_VIRTUAL_SENSOR capability.

    Does someone knows is which case it should be set?

    Thank you.

    Tuesday, July 10, 2018 1:21 PM

Answers

  • Hi,

    Virtual sensors are used to register a biometric sensor with the Windows Biometric Framework when a device does not support the standard way of registering through a WBDI supported driver. Usually a driver for a biometric device will specify its class as "Biometric" and add properties of the sensor to the registry through the driver .inf when the device is installed. The Windows Biometric Framework will try to enumerate the device when the driver is loaded. 

    If for some reason a device does not support pnp and there is no .inf to register the device, then it can be manually added to the registry. The device can specify that it is a virtual sensor so that the framework will try to enumerate the device even though there isn't an associated pnp driver. 

    Tuesday, July 17, 2018 12:03 AM