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VideoWindow Property

Summary

Gets the handle to the current video window.

Syntax

C#
VB
C++
public virtual IntPtr VideoWindow { get; } 
Public Overridable ReadOnly Property VideoWindow As IntPtr 
public: 
virtual property IntPtr VideoWindow { 
   IntPtr get(); 
} 

Property Value

An IntPtr value representing the video window handle.

Example

C#
VB
using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
public bool _result = false; 
public CaptureCtrlForm _form = new CaptureCtrlForm(); 
public CaptureCtrl _capturectrl; 
 
public void VideoWindowExample() 
{ 
   // reference the capture control 
   _capturectrl = _form.CaptureCtrl; 
 
   // output file 
   string outFile = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_VideoWindowExample.avi"); 
 
   try 
   { 
      // set the source video device, select using your device name here 
      if (_capturectrl.VideoDevices["USB"] == null) 
         throw new Exception("No USB video device available"); 
 
      _capturectrl.VideoDevices["USB"].Selected = true; 
 
      // set the target output file 
      _capturectrl.TargetFile = outFile; 
 
      if (_capturectrl.IsModeAvailable(CaptureMode.Video)) 
      { 
         // enable the preview 
         _capturectrl.Preview = true; 
 
         // subscrible to the started event 
         _capturectrl.Started += new EventHandler(CaptureCtrl_Started); 
 
         // start capture 
         _capturectrl.StartCapture(CaptureMode.Video); 
 
         // get the video window handle 
         IntPtr handle = _capturectrl.VideoWindow; 
 
         // set the result to what we expect 
         _result = (handle != null); 
      } 
   } 
   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(); 
} 
 
void CaptureCtrl_Started(object sender, EventArgs e) 
{ 
   // stop the capture (we don't need a complete capture for this example) 
   _capturectrl.StopCapture(); 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 19\Media"; 
} 
Imports Leadtools 
Imports Leadtools.MediaFoundation 
Imports LeadtoolsMediaFoundationExamples.Fixtures 
 
Public _result As Boolean = False 
Public _form As New CaptureCtrlForm() 
Public _capturectrl As CaptureCtrl 
 
Public Sub VideoWindowExample() 
   ' reference the capture control 
   _capturectrl = _form.CaptureCtrl 
 
   ' output file 
   Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_VideoWindowExample.avi") 
 
   Try 
      ' set the source video device, select using your device name here 
      If _capturectrl.VideoDevices("USB") Is Nothing Then 
         Throw New Exception("No USB video device available") 
      End If 
 
      _capturectrl.VideoDevices("USB").Selected = True 
 
      ' set the target output file 
      _capturectrl.TargetFile = outFile 
 
      If _capturectrl.IsModeAvailable(CaptureMode.Video) Then 
         ' enable the preview 
         _capturectrl.Preview = True 
 
         ' subscrible to the started event 
         AddHandler _capturectrl.Started, AddressOf CaptureCtrl_Started 
 
         ' start capture 
         _capturectrl.StartCapture(CaptureMode.Video) 
 
         ' get the video window handle 
         Dim handle As IntPtr = _capturectrl.VideoWindow 
 
         ' set the result to what we expect 
         _result = (handle <> Nothing) 
      End If 
   Catch generatedExceptionName 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. 
   While _capturectrl.State = CaptureState.Running 
      Application.DoEvents() 
   End While 
End Sub 
 
Private Sub CaptureCtrl_Started(ByVal sender As Object, ByVal e As EventArgs) 
   ' stop the capture (we don't need a complete capture for this example) 
   _capturectrl.StopCapture() 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 19\Media" 
End Class 

Requirements

Target Platforms

Help Version 19.0.2017.10.19
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Leadtools.MediaFoundation Assembly