VideoWindowLeft Property

Summary

Gets the left position of the video window.

Syntax
C#
VB
C++
public virtual float VideoWindowLeft { get; } 
Public Overridable ReadOnly Property VideoWindowLeft As Single 
public: 
virtual property float VideoWindowLeft { 
   float get(); 
} 

Property Value

A value representing the left position of the video window.

Remarks

The value is in the units specified by the ScaleMode property.

Example
C#
VB
using Leadtools; 
using Leadtools.Multimedia; 
using LeadtoolsMultimediaExamples.Fixtures; 
 
public bool _result = false; 
public CaptureCtrlForm _form = new CaptureCtrlForm(); 
 
// capture control 
CaptureCtrl capturectrl; 
 
// output file 
string outFile = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_VideoWindowLeftExample.avi"); 
 
public void VideoWindowLeftExample() 
{ 
   // reference the capture control 
   capturectrl = _form.CaptureCtrl; 
 
   // video window left 
   Single Left = 0; 
 
   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; 
 
      // select a video compressor 
      capturectrl.VideoCompressors.Mpeg4.Selected = true; 
 
      // set the target output file 
      capturectrl.TargetFile = outFile; 
 
      if (capturectrl.IsModeAvailable(CaptureMode.Video)) 
      { 
         // enable the preview 
         capturectrl.Preview = true; 
 
         // get the video window left 
         Left = capturectrl.VideoWindowLeft; 
 
         // set the result to what we expect 
         _result = (Left != 0); 
      } 
   } 
   catch (COMException) 
   { 
      _result = false; 
   } 
   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 CaptureCtrlForm = New CaptureCtrlForm() 
Public _capturectrl As CaptureCtrl 
 
Public Sub VideoWindowLeftExample() 
   ' reference the capture control 
   _capturectrl = _form.CaptureCtrl 
 
   ' output file 
   Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_VideoWindowLeftExample.avi") 
 
   ' video window left 
   Dim Left As Single 
 
   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 
 
      ' select a video compressor 
      _capturectrl.VideoCompressors.Mpeg4.Selected = True 
 
      ' set the target output file 
      _capturectrl.TargetFile = outFile 
 
      If _capturectrl.IsModeAvailable(CaptureMode.Video) Then 
         ' enable the preview 
         _capturectrl.Preview = True 
 
         ' get the video window left 
         Left = _capturectrl.VideoWindowLeft 
 
         ' set the result to what we expect 
         _result = (Left >= 0) 
 
      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 20\Media" 
End Class 
Requirements

Target Platforms

Help Version 20.0.2019.11.25
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Leadtools.Multimedia Assembly