Звук

[linkoln_7]

подскажите как мне сделать, что бы при нажатии кнопки звук на системе выключался,а по другой кнопки обратно включался

[GetMax]

using System.Runtime.InteropServices;

private const int APPCOMMAND_VOLUME_MUTE = 0x80000;
private const int APPCOMMAND_VOLUME_UP = 0xA0000;
private const int APPCOMMAND_VOLUME_DOWN = 0x90000;
const int WM_APPCOMMAND = 0x319;
bool SoundOn = true;
 /*Sound On*/
        private void button1_Click(object sender, EventArgs e)
        {
            if (!SoundOn)
            {
                SendMessageW(this.Handle, WM_APPCOMMAND, this.Handle, (IntPtr)APPCOMMAND_VOLUME_MUTE);
                SoundOn = true;
            }

        }

        /*Sound Off*/
        private void button2_Click(object sender, EventArgs e)
        {
            if (SoundOn)
            {
                SendMessageW(this.Handle, WM_APPCOMMAND, this.Handle, (IntPtr)APPCOMMAND_VOLUME_MUTE);
                SoundOn = false;
            }
        }
        [DllImport("user32.dll")]

        public static extern IntPtr SendMessageW(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam);

http://www.csharpcoderr.com/2012/09/windows-volume.html