[DllImport("winmm.dll", EntryPoint = "mciSendStringA", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        private static extern int mciSendString(string lpstrCommand, string lpstrReturnString, int uReturnLength, int hwndCallback);



private void StartRecording_btn_Click(object sender, EventArgs e)
        {
            mciSendString("open new Type waveaudio Alias recsound", "", 0, 0);
            mciSendString("record recsound", "", 0, 0);            
        }

        private void StopRecording_btn_Click(object sender, EventArgs e)
        {
            mciSendString("save recsound C:\\Users\\FUJITSU\\Desktop\\record\\result.wav", "", 0, 0);
            mciSendString("close recsound ", "", 0, 0);

        }