想问一下，如果知道控制面板中，音频设置中的录音设备选择情况，比如麦克风是否被选中，并且想通过程序选择录音设备

[aoosang]

如题，

[xqk]

up

[aoosang]

ok自己解决了，留下代码,供人借鉴






BOOL CMixer::GetChecked(MIXERLINE *pMixLine)
{
MIXERLINE mxl;
mxl.cbStruct = sizeof(MIXERLINE);
mxl.dwComponentType= MIXERLINE_COMPONENTTYPE_DST_WAVEIN;
if(mixerGetLineInfo((HMIXEROBJ)m_hMixer,&mxl,
MIXER_OBJECTF_HMIXER | MIXER_GETLINEINFOF_COMPONENTTYPE)
!= MMSYSERR_NOERROR)
{
return FALSE;
}

MIXERCONTROL mxc;
MIXERLINECONTROLS mxlc;
mxlc.cbStruct = sizeof(MIXERLINECONTROLS);
mxlc.dwLineID = mxl.dwLineID;
mxlc.cControls =1;
mxlc.dwControlType = MIXERCONTROL_CONTROLTYPE_MIXER;
mxlc.cbmxctrl = sizeof(MIXERCONTROL);
mxlc.pamxctrl =&mxc;
if(mixerGetLineControls((HMIXEROBJ)m_hMixer,&mxlc, MIXER_OBJECTF_HMIXER | MIXER_GETLINECONTROLSF_ONEBYTYPE)
!= MMSYSERR_NOERROR)
{
// no mixer, try MUX

mxlc.cbStruct = sizeof(MIXERLINECONTROLS);
mxlc.dwLineID = mxl.dwLineID;
mxlc.dwControlType = MIXERCONTROL_CONTROLTYPE_MUX;
mxlc.cControls = 1;
mxlc.cbmxctrl = sizeof(MIXERCONTROL);
mxlc.pamxctrl = &mxc;
if (::mixerGetLineControls(reinterpret_cast<HMIXEROBJ>(m_hMixer),
&mxlc,
MIXER_OBJECTF_HMIXER |
MIXER_GETLINECONTROLSF_ONEBYTYPE)
!= MMSYSERR_NOERROR)
{
return FALSE;
}
}


MIXERCONTROLDETAILS_LISTTEXT *pmxcdSelectText =
new MIXERCONTROLDETAILS_LISTTEXT[mxc.cMultipleItems];
if(pmxcdSelectText != NULL)
{

MIXERCONTROLDETAILS mxcd;
mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS);
mxcd.dwControlID = mxc.dwControlID;
mxcd.cChannels = 1;
mxcd.cMultipleItems = mxc.cMultipleItems;
mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_LISTTEXT);
mxcd.paDetails = pmxcdSelectText;
if (::mixerGetControlDetails((HMIXEROBJ)m_hMixer,&mxcd, MIXER_OBJECTF_HMIXER |MIXER_GETCONTROLDETAILSF_LISTTEXT)
== MMSYSERR_NOERROR)
{

MIXERCONTROLDETAILS_BOOLEAN *pmxcdSelectValue =
new MIXERCONTROLDETAILS_BOOLEAN[mxc.cMultipleItems];

if (pmxcdSelectValue != NULL)
{
MIXERCONTROLDETAILS mxcdV;
mxcdV.cbStruct = sizeof(MIXERCONTROLDETAILS);
mxcdV.dwControlID = mxc.dwControlID;
mxcdV.cChannels = 1;
mxcdV.cMultipleItems = mxc.cMultipleItems;
mxcdV.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);
mxcdV.paDetails = pmxcdSelectValue;
if (::mixerGetControlDetails((HMIXEROBJ)m_hMixer,&mxcdV,MIXER_OBJECTF_HMIXER |MIXER_GETCONTROLDETAILSF_VALUE)
== MMSYSERR_NOERROR)
{

for (DWORD dwi = 0; dwi < mxc.cMultipleItems; dwi++)
{
// get the line information
pMixLine->cbStruct = sizeof(MIXERLINE);
pMixLine->dwLineID = pmxcdSelectText[dwi].dwParam1;
if (::mixerGetLineInfo((HMIXEROBJ)m_hMixer, pMixLine,MIXER_OBJECTF_HMIXER | MIXER_GETLINEINFOF_LINEID)
== MMSYSERR_NOERROR )
{
//
if(pmxcdSelectValue[dwi].fValue)
{
delete []pmxcdSelectValue;
delete []pmxcdSelectText;
return TRUE;
}
}
}
}
delete []pmxcdSelectValue;
}

}
delete []pmxcdSelectText;
}

return FALSE;
}