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mixerGetControlDetails
The mixerGetControlDetails function retrieves details about a single control associated with an audio
line.
MMRESULT mixerGetControlDetails(
HMIXEROBJ hmxobj,
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| LPMIXERCONTROLDETAILS pmxcd,
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| DWORD fdwDetails
|
| );
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|
Parameters
hmxobj
Handle of the mixer device object being queried.
pmxcd
Address of a MIXERCONTROLDETAILS structure, which is filled with state information about the control.
fdwDetails
Flags for retrieving control details. The following values are defined:
MIXER_GETCONTROLDETAILSF_LISTTEXT
The paDetails member of the MIXERCONTROLDETAILS structure points to one or more MIXERCONTROLDETAILS_LISTTEXT structures to receive text labels for multiple-item controls. An application
must get all list text items for a multiple-item control at once. This flag
cannot be used with MIXERCONTROL_CONTROLTYPE_CUSTOM controls.
MIXER_GETCONTROLDETAILSF_VALUE
Current values for a control are retrieved. The paDetails member of the MIXERCONTROLDETAILS structure points to one or more details structures appropriate for the
control class.
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 (Musical Instrument Digital Interface)
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 Values
Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error
values include the following:
MIXERR_INVALCONTROL
| The control reference is invalid.
| 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 mixer device is available for the object specified by hmxobj.
|
Remarks
All members of the MIXERCONTROLDETAILS structure must be initialized before calling this function.
See Also
MIXERCONTROLDETAILS, MIXERCONTROLDETAILS_LISTTEXT, auxGetNumDevs, midiInOpen, midiOutOpen, mixerOpen, waveInOpen, waveOutOpen, midiInGetNumDevs, midiOutGetNumDevs, mixerGetNumDevs, waveInGetNumDevs, waveOutGetNumDevs
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