/// <summary>
        /// Executed when the Replay/Stop button is clicked
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnReplay_Click(object sender, EventArgs e)
        {
            if (_replayFeed == null)
            {
                //Start new replay using specified file name
                _replayFeed = new ApiEventFeedReplay(txtFileName.Text);
                string securitySymbol = System.IO.Path.GetFileName(txtFileName.Text).Substring(0, 3);

                //Create stock to process events
                _security = new Security(securitySymbol);
                _replayFeed.AddSecurity(_security);
                securityMarketView.Security = _security;

                //Initiate replay on separate thread
                _replayThread = new Thread(_replayFeed.Execute);
                _replayThread.Start();

                //Update GUI controls
                btnPause.Enabled = true;
                btnReplay.Text   = "Stop";
                ReplayToolTips.SetToolTip(btnReplay, "Stop replay");
            }
            else
            {
                //Stop replay
                Stop();

                //Update GUI controls
                btnPause.Enabled = false;
                btnReplay.Text   = "Replay";
                ReplayToolTips.SetToolTip(btnReplay, "Start replay");
                btnPause_Click(this, null);
            }
        }
 /// <summary>
 /// Executed when the Pause/Resume button is clicked during replay
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void btnPause_Click(object sender, EventArgs e)
 {
     if ((_replayFeed != null) && (!_replayFeed.IsPaused))
     {
         _replayFeed.Pause();
         btnPause.Text = ">>>";
         ReplayToolTips.SetToolTip(btnPause, "Resume replay");
         btnNextEvent.Enabled = true;
     }
     else
     {
         if (_replayFeed != null)
         {
             _replayFeed.Resume();
         }
         btnPause.Text = "| |";
         ReplayToolTips.SetToolTip(btnPause, "Pause replay");
         btnNextEvent.Enabled = false;
     }
 }