mixerGetControlDetails (Windows CE 5.0)
This function retrieves details about a single control associated with an audio line.
MMRESULTmixerGetControlDetails(HMIXEROBJhmxobj, LPMIXERCONTROLDETAILSpmxcd,DWORDfdwDetails);
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 table shows the possible flags.
Flag Description 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_HMIXER The hmxobj parameter is a mixer device handle returned by the mixerOpen function. This flag is optional.
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.
The following flags are supported in other versions of Windows, but not in Windows CE.
Flags not supported in Windows CE MIXER_OBJECTF_AUX MIXER_OBJECTF_HMIDIN MIXER_OBJECTF_HMIDIOUT MIXER_OBJECTF_HWAVEIN MIXER_OBJECTF_HWAVEOUT MIXER_OBJECTF_MIDIIN MIXER_OBJECTF_MIDIOUT MIXER_OBJECTF_WAVEHOUT MIXER_OBJECTF_WAVEIN
Return Values
Returns MMSYSERR_NOERROR if successful or an error otherwise.
The following table shows the possible error values.
| Value | Description |
|---|---|
| MIXERR_INVALCONTROL | The control reference is invalid. |
| MIXERR_INVALLINE | The audio line 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
OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.
Header: Mmsystem.h.
Link Library: Coredll.lib.
See Also
MIXERCONTROLDETAILS | MIXERCONTROLDETAILS_LISTTEXT | mixerOpen | mixerGetNumDevs | Hardware Audio Mixer Functions
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