ToggleClosedCaptioning Method

Summary

Switches the state of the closed captioning mode on or off.

Syntax
C#
VB
C++
public virtual void ToggleClosedCaptioning() 
Public Overridable Sub ToggleClosedCaptioning()  
public: 
virtual void ToggleClosedCaptioning();  
Remarks

Use this method to turn closed captioning on and off. If the method fails, an error is raised. For more information, refer to the Error Codes.

Example
C#
VB
using Leadtools; 
using Leadtools.Multimedia; 
using LeadtoolsMultimediaExamples.Fixtures; 
 
public bool _result = false; 
public PlayCtrlForm _form = new PlayCtrlForm(); 
public PlayCtrl _playctrl; 
 
public void ClosedCaptioningExample() 
{ 
   // reference the capture control 
   _playctrl = _form.PlayCtrl; 
 
   // input file names 
   string inFile = Path.Combine(LEAD_VARS.MediaDir, "VIDEO_TS.IFO"); 
 
   try 
   { 
      // turn off auto start 
      _playctrl.AutoStart = false; 
 
      // use DVD source 
      _playctrl.UseDVDSource = true; 
 
      // set the allowed stream types 
      _playctrl.AllowedStreams = StreamFormatType.AudioVideoCC; 
 
      // set the source file 
      _playctrl.SourceFile = inFile; 
 
      // check whether closed captioning is enabled 
      if (_playctrl.ClosedCaptioning == false) 
      { 
         // try to toggle closed captioning  
         _playctrl.ToggleClosedCaptioning(); 
      } 
 
      // if closed captioning is available 
      if (_playctrl.ClosedCaptioning) 
      { 
         // set the result 
         _result = true; 
      } 
 
      // start the playback 
      _playctrl.Run(); 
 
      // 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 (_playctrl.State == PlayState.Running) 
         Application.DoEvents(); 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 20\Media"; 
} 
Imports Leadtools 
Imports Leadtools.Multimedia 
Imports LeadtoolsMultimediaExamples.Fixtures 
 
Public _result As Boolean = False 
Public _form As PlayCtrlForm = New PlayCtrlForm() 
Public _playctrl As PlayCtrl 
 
Public Sub ClosedCaptioningExample() 
   ' reference the capture control 
   _playctrl = _form.PlayCtrl 
 
   ' input file names 
   Dim inFile As String = Path.Combine(LEAD_VARS.MediaDir, "VIDEO_TS.IFO") 
 
   Try 
      ' turn off auto start 
      _playctrl.AutoStart = False 
 
      ' use DVD source 
      _playctrl.UseDVDSource = True 
 
      ' set the allowed stream types 
      _playctrl.AllowedStreams = StreamFormatType.AudioVideoCC 
 
      ' set the source file 
      _playctrl.SourceFile = inFile 
 
      ' check if closed captioning is enabled 
      If _playctrl.ClosedCaptioning = False Then 
         ' try to toggle closed captioning  
         _playctrl.ToggleClosedCaptioning() 
      End If 
 
      ' if closed captioning is available 
      If _playctrl.ClosedCaptioning Then 
         ' set the result 
         _result = True 
      End If 
 
      ' start the playback 
      _playctrl.Run() 
 
      ' 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 _playctrl.State = PlayState.Running 
         Application.DoEvents() 
      Loop 
   Catch e1 As Exception 
      _result = False 
   End Try 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 20\Media" 
End Class 
Requirements

Target Platforms

See Also

Reference

PlayCtrl Class

PlayCtrl Members

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