Public Overridable Sub ToggleClosedCaptioning() 

Dim instance As CaptureCtrl
 
instance.ToggleClosedCaptioning()

public virtual void ToggleClosedCaptioning()

public:
virtual void ToggleClosedCaptioning(); 

Public _result As Boolean = False
      Public _form As CaptureCtrlForm = New CaptureCtrlForm()
      Public _capturectrl As CaptureCtrl
      Public Sub ClosedCaptioningExample()
         ' reference the capture control
         _capturectrl = _form.CaptureCtrl

         ' output file names
         Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_ClosedCaptioningExample_DVD")

         Try
            ' try to find a Digital tuner, use your device name here
            If _capturectrl.VideoDevices("Analog") Is Nothing Then
               Throw New Exception("No Analog video device available")
            End If

            _capturectrl.VideoDevices("Analog").Selected = True

            ' select video and audio compressors
            _capturectrl.VideoCompressors.Mpeg2.Selected = True
            _capturectrl.AudioCompressors.AC3.Selected = True

            ' set the target format to MPEG2 program
            _capturectrl.TargetFormat = TargetFormatType.MPEG2Program

            If _capturectrl.HasDialog(CaptureDlg.TargetFormat) Then
               _capturectrl.ShowDialog(CaptureDlg.TargetFormat, _form)
            End If

            ' tune to a channel with closed captions
            _capturectrl.TVTuner.SetChannel(28, -1, -1)

            ' set the target file
            _capturectrl.TargetFile = outFile

            ' enable the preview
            _capturectrl.Preview = True

            ' check if closed captioning is enabled
            If _capturectrl.ClosedCaptionAvailable AndAlso _capturectrl.ClosedCaptioning = False Then
               ' try to toggle closed captioning 
               _capturectrl.ToggleClosedCaptioning()

               ' set the result to what we expect
               If _capturectrl.ClosedCaptioning Then
                  _result = True
               End If

               ' get the previewing cc state
               Dim _previewCC As Boolean = _capturectrl.PreviewingClosedCaption
            End If

            ' check if we have can capture video
            If _capturectrl.IsModeAvailable(CaptureMode.VideoAndAudio) Then
               _capturectrl.TimeLimit = 30 ' just 30 seconds of capture time
               _capturectrl.UseTimeLimit = True

               ' start the capture process
               _capturectrl.StartCapture(CaptureMode.VideoAndAudio)

               ' we'll loop on the state and pump messages for this example.
               ' but you should not need to if running from a Windows Forms application.
               Do While _capturectrl.State = CaptureState.Running
                  Application.DoEvents()
               Loop

               _result = True
            End If
         Catch e1 As Exception
            _result = False
         End Try

         ' we'll loop on the state and pump messages for this example.
         ' but you should not need to if running from a Windows Forms application.
         Do While _capturectrl.State = CaptureState.Running
            Application.DoEvents()
         Loop
      End Sub

Public NotInheritable Class LEAD_VARS
   Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 17\Media"
End Class

public bool _result = false;
      public CaptureCtrlForm _form = new CaptureCtrlForm();
      public CaptureCtrl _capturectrl;
      public void ClosedCaptioningExample()
      {
         // reference the capture control
         _capturectrl = _form.CaptureCtrl;

         // output file names
         string outFile = Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_ClosedCaptioningExample_DVD");

         try
         {
            // try to find a Digital tuner, use your device name here
            if (_capturectrl.VideoDevices["Analog"] == null)
               throw new Exception("No Analog video device available");

            _capturectrl.VideoDevices["Analog"].Selected = true;

            // select video and audio compressors
            _capturectrl.VideoCompressors.Mpeg2.Selected = true;
            _capturectrl.AudioCompressors.AC3.Selected = true;

            // set the target format to MPEG2 program
            _capturectrl.TargetFormat = TargetFormatType.MPEG2Program;

            if (_capturectrl.HasDialog(CaptureDlg.TargetFormat))
               _capturectrl.ShowDialog(CaptureDlg.TargetFormat, _form);

            // tune to a channel with closed captions
            _capturectrl.TVTuner.SetChannel(28, -1, -1);

            // set the target file
            _capturectrl.TargetFile = outFile;

            // enable the preview
            _capturectrl.Preview = true;

            // check if closed captioning is enabled
            if (_capturectrl.ClosedCaptionAvailable
               && _capturectrl.ClosedCaptioning == false)
            {
               // try to toggle closed captioning 
               _capturectrl.ToggleClosedCaptioning();

               // set the result to what we expect
               if (_capturectrl.ClosedCaptioning)
                  _result = true;

               // get the previewing cc state
               bool _previewCC = _capturectrl.PreviewingClosedCaption;
            }

            // check if we have can capture video
            if (_capturectrl.IsModeAvailable(CaptureMode.VideoAndAudio))
            {
               _capturectrl.TimeLimit = 30;      // just 30 seconds of capture time
               _capturectrl.UseTimeLimit = true;

               // start the capture process
               _capturectrl.StartCapture(CaptureMode.VideoAndAudio);

               // we'll loop on the state and pump messages for this example.
               // but you should not need to if running from a Windows Forms application.
               while (_capturectrl.State == CaptureState.Running)
                  Application.DoEvents();

               _result = true;
            }
         }
         catch (Exception)
         {
            _result = false;
         }

         // we'll loop on the state and pump messages for this example.
         // but you should not need to if running from a Windows Forms application.
         while (_capturectrl.State == CaptureState.Running)
            Application.DoEvents();
      }

static class LEAD_VARS
{
   public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 17\Media";
}