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mixerGetControlDetails function

The mixerGetControlDetails function retrieves details about a single control associated with an audio line.

Syntax

MMRESULT mixerGetControlDetails(
   HMIXEROBJ             hmxobj,
   LPMIXERCONTROLDETAILS pmxcd,
   DWORD                 fdwDetails
);

Parameters

  • hmxobj
    Handle to the mixer device object being queried.

  • pmxcd
    Pointer to a MIXERCONTROLDETAILS structure, which is filled with state information about the control.

  • fdwDetails
    Flags for retrieving control details. The following values are defined.

    Value Meaning
    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 value

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

Return code Description
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.

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

Unicode and ANSI names

mixerGetControlDetailsW (Unicode) and mixerGetControlDetailsA (ANSI)

See also

Audio Mixers

Audio Mixer Functions