如何以编程方式设置系统音量？ [英] How to programmatically set the system volume?

问题描述

可能重复：
  <一href="http://stackoverflow.com/questions/3221471/how-can-i-control-the-windows-7-mixer-programmatically">How我可以通过编程控制Windows 7调音台？

我要如何改变通过C＃.NET Windows系统卷？

How do I change the Windows System Volume via C#.Net?

推荐答案

下面是code：

using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace Test
{
    public class Test
    {
        private const int APPCOMMAND_VOLUME_MUTE = 0x80000;
        private const int APPCOMMAND_VOLUME_UP = 0xA0000;
        private const int APPCOMMAND_VOLUME_DOWN = 0x90000;
        private const int WM_APPCOMMAND = 0x319;

        [DllImport("user32.dll")]
        public static extern IntPtr SendMessageW(IntPtr hWnd, int Msg,
            IntPtr wParam, IntPtr lParam);

        private void Mute()
        {
            SendMessageW(this.Handle, WM_APPCOMMAND, this.Handle,
                (IntPtr)APPCOMMAND_VOLUME_MUTE);
        }

        private void VolDown()
        {
            SendMessageW(this.Handle, WM_APPCOMMAND, this.Handle,
                (IntPtr)APPCOMMAND_VOLUME_DOWN);
        }

        private void VolUp()
        {
            SendMessageW(this.Handle, WM_APPCOMMAND, this.Handle,
                (IntPtr)APPCOMMAND_VOLUME_UP);
        }
    }
}

源自： dotnetcurry

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