IOCTL_AG_SET_SPEAKER_VOL (Windows CE 5.0)

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This IOCTL sets the speaker volume of the headset or the hands-free device.

Parameters

• hDeviceContext
  [in] Device context handle.
• fSelector
  [in] Equals IOCTL_AG_SET_SPEAKER_VOL.
• cInBuffer
  [In] Equals the size of USHORT.
• pInBuffer
  [In] Pointer to a USHORT that stores the speaker volume.
• cOutBuffer
  Not used.
• pOutBuffer
  Not used.
• pcDataReturned
  Not used.

Return Values

Returns TRUE if successful, FALSE otherwise. To obtain extended error information, call the GetLastError function.

Remarks

To retrieve the current volume of the speaker, use the IOCTL_AG_GET_SPEAKER_VOL IOCTL.

Requirements

OS Versions: Windows CE 5.0 and later.
Header: Btagpub.h.

See Also

Audio Gateway Core Component

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