IOCTL_AG_CLOSE_AUDIO (Compact 2013)
3/26/2014
This I/O control message closes the currently open audio connection to the hands-free device. Send this message with DeviceIoControl.
Syntax
BOOL DeviceIoControl(
HANDLE hDevice, // handle to device
DWORD dwIoControlCode, // use IOCTL_AG_CLOSE_AUDIO
LPVOID lpInBuffer, // pointer to input buffer
DWORD nInBufferSize, // input buffer size
LPVOID lpOutBuffer, // pointer to output buffer
DWORD nOutBufferSize, // output buffer size
LPDWORD lpBytesReturned, // number of bytes returned
OVERLAPPED lpOverlapped // pointer to OVERLAPPED structure
);
Parameters
- hDevice
The handle to the device.
- dwIoControlCode
[in] Control code for the operation. Use IOCTL_AG_CLOSE_AUDIO for this operation.
- lpInBuffer
[in] Not used; set to NULL.
- nInBufferSize
[in] Not used; set to zero.
- lpOutBuffer
[out] Not used; set to NULL.
- nOutBufferSize
[out] Not used; set to zero.
- lpBytesReturned
[out] Not used; set to NULL.
- lpOverlapped
[out] Not used; set to NULL.
Remarks
Note
IOCTL_AG_CLOSE_AUDIO does not close the currently open service level connection. To close it, use IOCTL_AG_CLOSE_CONTROL.
This I/O control sends the WODM_BT_SCO_AUDIO_CONTROL message to the audio driver to disable audio routing. Other AG service I/O controls do not communicate with the audio driver.
To route audio to the headset or to the hands-free device independent of the network component, you must first open or close an audio connection. To open an audio connection to the hands-free device, use the IOCTL_AG_OPEN_AUDIO I/O control.
Requirements
Header |
btagpub.h |