auxGetVolume function

The auxGetVolume function retrieves the current volume setting of the specified auxiliary output device.


MMRESULT auxGetVolume(
  UINT    uDeviceID,
  LPDWORD pdwVolume



Identifier of the auxiliary output device to be queried.


Pointer to a variable to be filled with the current volume setting. The low-order word of this location contains the left channel volume setting, and the high-order word contains the right channel setting. A value of 0xFFFF represents full volume, and a value of 0x0000 is silence.

If a device does not support both left and right volume control, the low-order word of the specified location contains the volume level.

The full 16-bit setting(s) set with the auxSetVolume function are returned, regardless of whether the device supports the full 16 bits of volume-level control.

Return Value

Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error values include the following.

Return code Description
Specified device identifier is out of range.


Not all devices support volume control. To determine whether a device supports volume control, use the AUXCAPS_VOLUME flag to test the dwSupport member of the AUXCAPS structure (filled by the auxGetDevCaps function).

To determine whether a device supports volume control on both the left and right channels, use the AUXCAPS_LRVOLUME flag to test the dwSupport member of the AUXCAPS structure (filled by auxGetDevCaps).


Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header mmeapi.h (include Windows.h)
Library Winmm.lib
DLL Winmm.dll

See Also

Waveform Audio

Waveform Functions