请问：如何在VC6.0中控制系统声音？谢谢

Question

请问：如何在VC6.0中控制系统声音？谢谢就是系统托盘上的那个小喇叭！

Answer 1

在CSDN论坛中搜一下“音量”。        //CD音量
case 169:   //音量减小
 volumesize =  GetVolume(3);
 volumesize -= 4;
 if( volumesize < 0)
 volumesize = 0;
 SetVolume(3,volumesize);
  break;
 case 183:     //音量增加
 volumesize =  GetVolume(3);
 SetVolume(3,volumesize+6);
  break;////////////////////////////////////////////////////////////////////
bool GetVolumeControl(HMIXER hmixer ,long componentType,long ctrlType,MIXERCONTROL* mxc)
{
MIXERLINECONTROLS mxlc;
MIXERLINE mxl;
mxl.cbStruct = sizeof(mxl);
mxl.dwComponentType = componentType;
if(!mixerGetLineInfo((HMIXEROBJ)hmixer, &mxl, MIXER_GETLINEINFOF_COMPONENTTYPE))
{
mxlc.cbStruct = sizeof(mxlc);
mxlc.dwLineID = mxl.dwLineID;
mxlc.dwControlType = ctrlType;
mxlc.cControls = 1;
mxlc.cbmxctrl = sizeof(MIXERCONTROL);
mxlc.pamxctrl = mxc;
if(mixerGetLineControls((HMIXEROBJ)hmixer,&mxlc,MIXER_GETLINECONTROLSF_ONEBYTYPE))
return 0;
else
return 1;
}
return 0;
}
//---------------------------------------------------------------------------
long GetMuteValue(HMIXER hmixer ,MIXERCONTROL *mxc)
{
MIXERCONTROLDETAILS mxcd;
MIXERCONTROLDETAILS_BOOLEAN mxcdMute;
mxcd.hwndOwner = 0;
mxcd.cbStruct = sizeof(mxcd);
mxcd.dwControlID = mxc->dwControlID;
mxcd.cbDetails = sizeof(mxcdMute);
mxcd.paDetails = &mxcdMute;
mxcd.cChannels = 1;
mxcd.cMultipleItems = 0;
if (mixerGetControlDetails((HMIXEROBJ)hmixer, &mxcd,MIXER_OBJECTF_HMIXER|MIXER_GETCONTROLDETAILSF_VALUE))
return -1;
return mxcdMute.fValue;
}//---------------------------------------------------------------------------
unsigned GetVolumeValue(HMIXER hmixer ,MIXERCONTROL *mxc)
{
MIXERCONTROLDETAILS mxcd;
MIXERCONTROLDETAILS_UNSIGNED vol; vol.dwValue=0;
mxcd.hwndOwner = 0;
mxcd.cbStruct = sizeof(mxcd);
mxcd.dwControlID = mxc->dwControlID;
mxcd.cbDetails = sizeof(vol);
mxcd.paDetails = &vol;
mxcd.cChannels = 1;
if(mixerGetControlDetails((HMIXEROBJ)hmixer, &mxcd, MIXER_OBJECTF_HMIXER|MIXER_GETCONTROLDETAILSF_VALUE))
return -1;
return vol.dwValue;
}//---------------------------------------------------------------------------
bool SetMuteValue(HMIXER hmixer ,MIXERCONTROL *mxc, bool mute)
{
MIXERCONTROLDETAILS mxcd;
MIXERCONTROLDETAILS_BOOLEAN mxcdMute;mxcdMute.fValue=mute;
mxcd.hwndOwner = 0;
mxcd.dwControlID = mxc->dwControlID;
mxcd.cbStruct = sizeof(mxcd);
mxcd.cbDetails = sizeof(mxcdMute);
mxcd.paDetails = &mxcdMute;
mxcd.cChannels = 1;
mxcd.cMultipleItems = 0;
if (mixerSetControlDetails((HMIXEROBJ)hmixer, &mxcd, MIXER_OBJECTF_HMIXER|MIXER_SETCONTROLDETAILSF_VALUE))
return 0;
return 1;
}//---------------------------------------------------------------------------bool SetVolumeValue(HMIXER hmixer ,MIXERCONTROL *mxc, long volume)
{
MIXERCONTROLDETAILS mxcd;
MIXERCONTROLDETAILS_UNSIGNED vol;vol.dwValue = volume;
mxcd.hwndOwner = 0;
mxcd.dwControlID = mxc->dwControlID;
mxcd.cbStruct = sizeof(mxcd);
mxcd.cbDetails = sizeof(vol);
mxcd.paDetails = &vol;
mxcd.cChannels = 1;
if(mixerSetControlDetails((HMIXEROBJ)hmixer, &mxcd, MIXER_OBJECTF_HMIXER|MIXER_SETCONTROLDETAILSF_VALUE))
return 0;
return 1;
}
//---------------------------------------------------------------------------
unsigned WINAPI GetVolume(int dev)//得到设备的音量dev=0主音量，1WAVE ,2MIDI ,3 LINE IN
{long device;unsigned rt=0;
MIXERCONTROL volCtrl;
HMIXER hmixer;
  switch (dev)
   {
    case 1:
           device=MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; 
   break;
    case 2:
            device=MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; 
break;
    case 3:
          //  device=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC; break;  // cd 音量
          //  device=MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE; break;   //麦克风音量
          //  device=MIXERLINE_COMPONENTTYPE_SRC_LINE; break;         //PC 扬声器音量
            device=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC; 
break;    //default:
            //device=MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
   }if(mixerOpen(&hmixer, 0, 0, 0, 0)) return 0;
if(!GetVolumeControl(hmixer,device,MIXERCONTROL_CONTROLTYPE_VOLUME,&volCtrl))
return 0;
rt=GetVolumeValue(hmixer,&volCtrl)*100/volCtrl.Bounds.lMaximum;
mixerClose(hmixer);
return rt;}//---------------------------------------------------------------------------bool WINAPI SetVolume(long dev,unsigned vol)//设置设备的音量
{
// dev =0,1,2   分别表示主音量,波形,MIDI ,LINE IN
// vol=0-100    表示音量的大小 , 设置与返回音量的值用的是百分比，即音量从0 - 100，而不是设备的绝对值
// retrun false 表示设置音量的大小的操作不成功
// retrun true  表示设置音量的大小的操作成功long device;
bool rc=false;
MIXERCONTROL volCtrl;
HMIXER hmixer;
switch (dev)
 {
  case 1:
           device=MIXERLINE_COMPONENTTYPE_SRC_WAVEOUT; 
   break;
  case 2:
           device=MIXERLINE_COMPONENTTYPE_SRC_SYNTHESIZER; 
   break;
  case 3:
           device=MIXERLINE_COMPONENTTYPE_SRC_COMPACTDISC; 
   break;  //default:
           //device=MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
 }if(mixerOpen(&hmixer, 0, 0, 0, 0)) return 0;if(GetVolumeControl(hmixer,device,MIXERCONTROL_CONTROLTYPE_VOLUME,&volCtrl))
  {
  vol=vol*volCtrl.Bounds.lMaximum/100;
  if(SetVolumeValue(hmixer,&volCtrl,vol))
  rc=true;
  }
mixerClose(hmixer);
return rc;
}//---------------------------------------------------------------------------