mixerGetID function
The mixerGetID function retrieves the device identifier for a mixer device associated with a specified device handle.
Syntax
MMRESULT mixerGetID(
HMIXEROBJ hmxobj,
UINT FAR *puMxId,
DWORD fdwId
);
Parameters
hmxobj
Handle to the audio mixer object to map to a mixer device identifier.puMxId
Pointer to a variable that receives the mixer device identifier. If no mixer device is available for the hmxobj object, the value -1 is placed in this location and the MMSYSERR_NODRIVER error value is returned.fdwId
Flags for mapping the mixer object hmxobj. The following values are defined.Value Meaning MIXER_OBJECTF_AUX The hmxobj parameter is an auxiliary device identifier in the range of zero to one less than the number of devices returned by the auxGetNumDevs function. MIXER_OBJECTF_HMIDIIN The hmxobj parameter is the handle of a MIDI input device. This handle must have been returned by the midiInOpen function. MIXER_OBJECTF_HMIDIOUT The hmxobj parameter is the handle of a MIDI output device. This handle must have been returned by the midiOutOpen function. MIXER_OBJECTF_HMIXER The hmxobj parameter is a mixer device handle returned by the mixerOpen function. This flag is optional. MIXER_OBJECTF_HWAVEIN The hmxobj parameter is a waveform-audio input handle returned by the waveInOpen function. MIXER_OBJECTF_HWAVEOUT The hmxobj parameter is a waveform-audio output handle returned by the waveOutOpen function. MIXER_OBJECTF_MIDIIN The hmxobj parameter is the identifier of a MIDI input device. This identifier must be in the range of zero to one less than the number of devices returned by the midiInGetNumDevs function. MIXER_OBJECTF_MIDIOUT The hmxobj parameter is the identifier of a MIDI output device. This identifier must be in the range of zero to one less than the number of devices returned by the midiOutGetNumDevs function. MIXER_OBJECTF_MIXER The hmxobj parameter is the identifier of a mixer device in the range of zero to one less than the number of devices returned by the mixerGetNumDevs function. This flag is optional. MIXER_OBJECTF_WAVEIN The hmxobj parameter is the identifier of a waveform-audio input device in the range of zero to one less than the number of devices returned by the waveInGetNumDevs function. MIXER_OBJECTF_WAVEOUT The hmxobj parameter is the identifier of a waveform-audio output device in the range of zero to one less than the number of devices returned by the waveOutGetNumDevs function.
Return value
Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error values include the following.
| Return code | Description |
|---|---|
| MMSYSERR_BADDEVICEID | The hmxobj parameter specifies an invalid device identifier. |
| MMSYSERR_INVALFLAG | One or more flags are invalid. |
| MMSYSERR_INVALHANDLE | The hmxobj parameter specifies an invalid handle. |
| MMSYSERR_INVALPARAM | One or more parameters are invalid. |
| MMSYSERR_NODRIVER | No audio mixer device is available for the object specified by hmxobj. The location referenced by puMxId also contains the value -1. |
Requirements
Minimum supported client |
Windows 2000 Professional [desktop apps only] |
Minimum supported server |
Windows 2000 Server [desktop apps only] |
Header |
Mmsystem.h (include Windows.h) |
Library |
Winmm.lib |
DLL |
Winmm.dll |