// bthhfpddi.h
// CTL_CODE(0x0022, 0x004, METHOD_NEITHER, FILE_ANY_ACCESS)
#define IOCTL_BTHHFP_DEVICE_REQUEST_DISCONNECT 0x00220013
View the official Windows Driver Kit DDI referenceNo description available.
The IOCTL_BTHHFP_DEVICE_REQUEST_DISCONNECT IOCTL removes the Handfree Profile (HFP) Service Level Connection that existed between the audio driver and the Bluetooth device.
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This request initiates the process to disconnect the Service Level Connection and ends without waiting for the disconnection to complete. Connection status can be determined using IOCTL_BTHHFP_DEVICE_GET_CONNECTION_STATUS_UPDATE.
The audio driver sends this request from its handler for the KSPROPERTY_ONESHOT_DISCONNECT KS property.
IOCTL_BTHHFP_DEVICE_GET_CONNECTION_STATUS_UPDATE