// winbio_ioctl.h

typedef struct _WINBIO_GET_INDICATOR {
  DWORD                   PayloadSize;
  HRESULT                 WinBioHresult;
  WINBIO_INDICATOR_STATUS IndicatorStatus;
} WINBIO_GET_INDICATOR, *PWINBIO_GET_INDICATOR;
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Windows Driver Kit DDI reference (ns-winbio_ioctl-_winbio_get_indicator)

_WINBIO_GET_INDICATOR structure

Description

The WINBIO_GET_INDICATOR structure is the OUT payload for IOCTL_BIOMETRIC_GET_INDICATOR.

Members

`PayloadSize`

Specifies the total size of the payload, which includes the fixed length structure and any variable data at the end.

`WinBioHresult`

Specifies an HRESULT that contains the status of the I/O operation. See IOCTL_BIOMETRIC_GET_INDICATOR for possible values.

`IndicatorStatus`

Specifies a WINBIO_INDICATOR_STATUS, which indicates whether the indicator light is on or off.

Possible values are shown in the following table.

Indicator status code	Description
WINBIO_INDICATOR_ON	The indicator light is on, and changes according to the sensor status. To be able to set WINBIO_INDICATOR_ON, you must set WINBIO_CAPABILITY_INDICATOR in the Capabilities member of the WINBIO_SENSOR_ATTRIBUTES structure.
WINBIO_INDICATOR_OFF	The sensor indicator light is off. Sensors that do not have an indicator light will always return this value in IOCTL_GET_SENSOR_STATUS.

WINBIO_GET_INDICATOR - NtDoc