private void enableProgressBar()
        {
            LaunchButton.IsEnabled      = false;
            KeyPairComb.IsEnabled       = false;
            SecurityGroupComb.IsEnabled = false;
            ZoneComb.IsEnabled          = false;
            mediumInst.IsEnabled        = false;
            smallInst.IsEnabled         = false;

            StatusDesc.Text               = ConstantString.Launching;
            LaunchProgBar.Visibility      = Visibility.Visible;
            LaunchProgBar.IsIndeterminate = true;
            Duration        duration        = new Duration(TimeSpan.FromSeconds(10));
            DoubleAnimation doubleanimation = new DoubleAnimation(200.0, duration);

            LaunchProgBar.BeginAnimation(System.Windows.Controls.ProgressBar.ValueProperty, doubleanimation);
            _dashboard.stopStatusUpdate();
        }
        private void disableProgressBar()
        {
            LaunchProgBar.IsIndeterminate = false;
            LaunchProgBar.BeginAnimation(System.Windows.Controls.ProgressBar.ValueProperty, null);
            LaunchProgBar.Visibility = Visibility.Hidden;

            if (_launchSucceed)
            {
                StatusDesc.Text = ConstantString.Done;
            }
            else
            {
                StatusDesc.Text = ConstantString.LaunchFailed;
            }

            LaunchButton.IsEnabled      = true;
            KeyPairComb.IsEnabled       = true;
            SecurityGroupComb.IsEnabled = true;
            ZoneComb.IsEnabled          = true;
            mediumInst.IsEnabled        = true;
            smallInst.IsEnabled         = true;
        }