C#--静音

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1.定义API

[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;

2.提高音量

SendMessage(this.Handle, WM_APPCOMMAND, 0x30292, APPCOMMAND_VOLUME_UP * 0x10000);

3.降低音量

SendMessage(this.Handle, WM_APPCOMMAND, 0x30292, APPCOMMAND_VOLUME_DOWN * 0x10000);

4.静音与恢复(执行两次恢复原状态)

SendMessage(this.Handle, WM_APPCOMMAND, 0x200eb0, APPCOMMAND_VOLUME_MUTE * 0x10000);