使用Windows API控制系统音量及静音

阿杰

一、引入API定义
[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]  static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, uint wParam, uint lParam);    const uint WM_APPCOMMAND = 0x319;  const uint APPCOMMAND_VOLUME_UP = 0x0a;  const uint APPCOMMAND_VOLUME_DOWN = 0x09;  const uint APPCOMMAND_VOLUME_MUTE = 0x08;
二、 提高音量
SendMessage(this.Handle, WM_APPCOMMAND, 0x30292, APPCOMMAND_VOLUME_UP * 0x10000);
三、 降低音量
SendMessage(this.Handle, WM_APPCOMMAND, 0x30292, APPCOMMAND_VOLUME_DOWN * 0x10000);
四、 静音与恢复（执行2次恢复原状态）
SendMessage(this.Handle, WM_APPCOMMAND, 0x200eb0, APPCOMMAND_VOLUME_MUTE * 0x10000);