c# - 在Windows XP/Vista/Seven中获得GET Master音量(通常通过键盘滚轮增加音量)

Question

我知道很多人问过这个问题，但是我没有读任何答案，是否有任何lib /通用方法来获取(未设置，我不需要)主卷(当前输出源的卷)声音，而不是声音)对xp / vista / seven都适用？

如果没有，如何针对xp，vista，7(我将编写通用包装器)进行处理

我需要显示一个进度条以显示如何设置当前音量(winform控件)

编辑:

我找到了一个有用的链接，我正在测试它，但是我不会检查答案，直到我得到有用的东西为止
http://www.codeproject.com/KB/audio-video/mixerSetControlDetails.aspx?display=Print

编辑2:

重要的是:以前的卷分析方法在Windows Vista或更高版本上不起作用，请改用以下lib:
http://www.codeproject.com/KB/vista/CoreAudio.aspx

我不知道是否真的行得通，因为我目前没有远景/七

Answer 1

mixerGetNumDevs和相关的API有帮助吗？ (您必须遍历所有带有mixerGetLineControls等的设备，并查看哪个MIXERCONTROL会说出“Volume”作为名称；还有一种方法可以检查标志。这就是您要查找的标志。)

编辑:

这是我的一些旧代码的片段；我不认为它可以编译，也不是很好的代码(我只需要完成工作即可)，但是它应该会有所帮助:

MMRESULT mmResult = mixerOpen(&hMixer, 0, (DWORD_PTR)hWnd, NULL, CALLBACK_WINDOW | MIXER_OBJECTF_MIXER);
if (MMSYSERR_NOERROR == mmResult)
{
    MIXERLINE mxl;
    mxl.cbStruct = sizeof(MIXERLINE);
    mxl.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;
    MMRESULT mmResult = mixerGetLineInfo((HMIXEROBJ)hMixer, &mxl, MIXER_OBJECTF_HMIXER | MIXER_GETLINEINFOF_COMPONENTTYPE);
    if (mmResult == MMSYSERR_NOERROR)
    {
        MIXERLINECONTROLS controls;
        memzero(&controls, sizeof(controls));
        controls.cbStruct = sizeof(controls);
        controls.cControls = 1;
        controls.dwLineID = mxl.dwLineID;
        controls.cbmxctrl = sizeof(MIXERCONTROL); //one element only!!
        MIXERCONTROL controlsArray[2]; //First element: volume, second element: mixer
        memzero(&controlsArray, sizeof(controlsArray));
        for (int i = 0; i < sizeof(controlsArray) / sizeof(*controlsArray); i++) { controlsArray[0].cbStruct = sizeof(controlsArray[0]); }

        controls.dwControlType = MIXERCONTROL_CONTROLTYPE_VOLUME;
        controls.pamxctrl = &controlsArray[0]; //NOTE: this is ZERO
        mmResult = mixerGetLineControls((HMIXEROBJ)hMixer, &controls, MIXER_GETLINECONTROLSF_ONEBYTYPE | MIXER_OBJECTF_HMIXER);
        if (mmResult == MMSYSERR_NOERROR)
        {
            controls.dwControlType = MIXERCONTROL_CONTROLTYPE_MUTE;
            controls.pamxctrl = &controlsArray[1]; //NOTE: this is ONE
            mmResult = mixerGetLineControls((HMIXEROBJ)hMixer, &controls, MIXER_GETLINECONTROLSF_ONEBYTYPE | MIXER_OBJECTF_HMIXER);
            if (mmResult == MMSYSERR_NOERROR)
            {
                bool isVolume = controls[0].dwControlID == (DWORD)lParam;
                bool isMute = controls[1].dwControlID == (DWORD)lParam;
                if (isVolume | isMute)
                {
                    MIXERCONTROLDETAILS details;
                    memzero(&details, sizeof(details));
                    details.cbStruct = sizeof(details);
                    details.cChannels = 1;
                    details.dwControlID = (DWORD)lParam;
                    MIXERCONTROLDETAILS_UNSIGNED controlDetail;
                    memzero(&controlDetail, sizeof(controlDetail));
                    details.paDetails = &controlDetail;
                    details.cbDetails = sizeof(controlDetail);
                    MMRESULT mmResult = mixerGetControlDetails((HMIXEROBJ)hMixer, &details, MIXER_GETCONTROLDETAILSF_VALUE | MIXER_OBJECTF_HMIXER);
                    if (mmResult == MMSYSERR_NOERROR)
                    {
                    }
                }
            }
        }
    }
}