      private void InitMenu()
        {
            playToolStripMenuItem.Enabled = false;
            nextToolStripMenuItem.Enabled = false;
            backToolStripMenuItem.Enabled = false;
            stepToolStripMenuItem.Enabled = false;
            stopToolStripMenuItem.Enabled = false;
            ejectToolStripMenuItem.Enabled = false;
            pauseToolStripMenuItem.Enabled = false;
        }
  
