如何关闭和开启系统的声音？

[general_cigarette]

就是如何关闭机器的那个小喇叭

[liuns]

mcisendstring() this function has many way to use,it can control all multimedia device .you can refer the msdn or other web site to gain full defining of that function .

[clin2y]

/*有声卡可用Beep();
MessageBeep();
没有声卡用
MessageBeep(0xffffffff
sound(int);发声
nosound();关闭
*/
MessageBeep(-1);
_sleep(500);
MessageBeep(MB_ICONASTERISK);
_sleep(500);
MessageBeep(MB_ICONEXCLAMATION);
_sleep(500);
MessageBeep(MB_ICONHAND);
_sleep(500);
MessageBeep(MB_ICONQUESTION);
_sleep(500);
MessageBeep(MB_OK);

_sleep(1000);
Beep(60,2000);

[ufc]

下面程序片段可能对你有帮助

MMRESULT m_mRetCode; // Return code.
HMIXER m_hMixer; // Mixer handle used in mixer API calls.
MIXERLINE m_MixerLine; // Holds the mixer line data.

MIXERCONTROL m_MixerCtrl; // Holds the mixer control data.
MIXERLINECONTROLS m_MixLineCtrls;// Obtains the mixer control.
MIXERCONTROLDETAILS m_MixCtrlDetail;

m_mRetCode = mixerOpen(&m_hMixer,
0,
0,
0,
0);
ZeroMemory(&m_MixerLine,sizeof(m_MixerLine));
m_MixerLine.cbStruct = sizeof(m_MixerLine);

m_MixerLine.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;

m_mRetCode = mixerGetLineInfo((HMIXEROBJ)m_hMixer,
&m_MixerLine,
MIXER_GETLINEINFOF_COMPONENTTYPE);
if (MMSYSERR_NOERROR != m_mRetCode)
{
throw IDS_STRINGPRO1002;
}
m_MixLineCtrls.dwControlType = MIXERCONTROL_CONTROLTYPE_MUTE;
ZeroMemory(&m_MixerCtrl, sizeof(m_MixerCtrl));
m_MixerCtrl.cbStruct = sizeof(m_MixerCtrl);

m_mRetCode = mixerGetLineControls((HMIXEROBJ)m_hMixer, &m_MixLineCtrls,
MIXER_GETLINECONTROLSF_ONEBYTYPE);
if (MMSYSERR_NOERROR != m_mRetCode)
{
throw IDS_STRINGPRO1003;
}
MIXERCONTROLDETAILS_BOOLEAN m_SilentFlag;

m_SilentFlag.fValue = true;

// Initialize the MIXERCONTROLDETAILS structure
m_MixCtrlDetail.cbDetails = sizeof(m_SilentFlag);
m_MixCtrlDetail.dwControlID = m_MixerCtrl.dwControlID;
m_MixCtrlDetail.paDetails = &m_SilentFlag;
m_mRetCode = mixerSetControlDetails((HMIXEROBJ)m_hMixer, &m_MixCtrlDetail,
ER_SETCONTROLDETAILSF_VALUE);
if (MMSYSERR_NOERROR != m_mRetCode)
{
throw IDS_STRINGPRO1003;
}
m_mRetCode = mixerClose(m_hMixer);

MSDN的SAMPLE下的MIXAPP工程提供完整的音频控制操作

祝好运！

[HKer_007]

MessageBeep();

[icansaymyabc]

那个东西没有函数进行控制，你想要显示或隐藏，得修改注册表的值然后重启。

[general_cigarette]

帮帮忙。。。。。

[kimryo]

http://www.codeguru.com/multimedia/MixerClasses.shtml

[general_cigarette]

呵呵，谢谢，不过我想要个函数。