[DllImport("winmm.dll")]
        static extern Int32 mciSendString(String command, StringBuilder buffer, Int32 bufferSize, IntPtr hwndCallback);
        private void openCDDriveToolStripMenuItem_Click(object sender, EventArgs e)
        {
            int ret = mciSendString("set cdaudio door open", null, 0, IntPtr.Zero);
        }

        private void closeCDDriveToolStripMenuItem_Click(object sender, EventArgs e)
        {
            int ret = mciSendString("set cdaudio door closed", null, 0, IntPtr.Zero);
        }