更改音量 win32 C++
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/699603/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
change volume win32 c++
提问by user37875
How would I go about changing the sound volume in c++ win32? Also how would I mute/unmute it? Thanks for the help!
我将如何在 c++ win32 中更改音量？另外我将如何静音/取消静音？谢谢您的帮助！
采纳答案by Clay Nichols
Two options:
两种选择：
Have you considered showing the Volume controls and letting the user? If so, I can post some code for that. (You basically just shell out to the volume control applet.
您是否考虑过显示音量控件并让用户使用？如果是这样，我可以为此发布一些代码。（您基本上只是使用音量控制小程序。
回答by Irwin
Use the waveOutSetVolumeAPI.
使用waveOutSetVolumeAPI。
Here's an example:
下面是一个例子：
DWORD dwVolume;
if (waveOutGetVolume(NULL, &dwVolume) == MMSYSERR_NOERROR)
waveOutSetVolume(NULL, 0); // mute volume
// later point in code, to unmute volume...
waveOutSetVolume(NULL, dwVolume);
回答by ReinstateMonica Larry Osterman
waveOutSetVolume and mixerSetControlDetails only change the volume for your application on Windows Vista and above.
waveOutSetVolume 和 mixSetControlDetails 仅更改您在 Windows Vista 及更高版本上的应用程序的音量。
If you want to change the master volume on Vista and beyond, search for the IAudioEndpointVolumeinterface.
如果您想在 Vista 及更高版本上更改主音量，请搜索IAudioEndpointVolume接口。
Here'sa blog post I wrote on this a couple of years ago.
回答by qwerty
Maybe you should consider to NOT change the global volume. Think about it - if I lower the volume in MediaPlayer all other programs are still as loud as before, and that is exactly what I expect from any program - to only lower it's OWN volume. Of course there might be reasons to change global volume, no offense ;)
也许您应该考虑不更改全局音量。想一想 - 如果我降低 MediaPlayer 中的音量，所有其他程序仍然像以前一样响亮，这正是我对任何程序的期望 - 只降低它自己的音量。当然，可能有理由改变全局音量，没有冒犯 ;)
回答by maximus
If all you want to do is change the volume then you can use the virtual key codes to change volume like this:
如果您只想更改音量，那么您可以使用虚拟键代码来更改音量，如下所示：
void changeVolume()
{
INPUT ip={0};
ip.type = INPUT_KEYBOARD;
ip.ki.wVk = VK_VOLUME_UP; //or VOLUME_DOWN or MUTE
SendInput(1, &ip, sizeof(INPUT));
ip.ki.dwFlags = KEYEVENTF_KEYUP;
SendInput(1, &ip, sizeof(INPUT));
}
回答by GrayFace
Simplest way to toggle mute is
切换静音的最简单方法是
const int APPCOMMAND_VOLUME_MUTE = 0x80000;
SendMessage(this.Handle, WM_APPCOMMAND, IntPtr.Zero, (IntPtr)APPCOMMAND_VOLUME_MUTE);
In similar way you can trigger +Volume and -Volume keys behavior. Take a look at http://www.blackwasp.co.uk/BasicVolumeControl.aspxand http://msdn.microsoft.com/en-us/library/windows/desktop/ms646247%28v=vs.85%29.aspx
以类似的方式，您可以触发 +Volume 和 -Volume 键行为。看看http://www.blackwasp.co.uk/BasicVolumeControl.aspx和http://msdn.microsoft.com/en-us/library/windows/desktop/ms646247%28v=vs.85%29。 aspx
There are also values for things like microphone volume control, but I haven't tried them.
还有一些诸如麦克风音量控制之类的值，但我还没有尝试过。
If you need more control over system master volume, you must check Windows version and do 2 versions of code:
Something like aforementioned Changing master volume levelfor Win XP.
Something like https://stackoverflow.com/a/3437069/1365066for Vista and higher.
如果您需要更多地控制系统主音量，则必须检查 Windows 版本并执行 2 个版本的代码：
类似于前面提到的更改Win XP 的主音量级别。对于 Vista 及更高版本，
类似于https://stackoverflow.com/a/3437069/1365066。
