Public Overridable Sub StopCapture() 

Dim instance As CaptureCtrl
 
instance.StopCapture()

public virtual void StopCapture()

public:
virtual void StopCapture(); 

Public _result As Boolean = False
      Public _form As CaptureCtrlForm = New CaptureCtrlForm()
      Public Sub CaptureImageExample()
         ' reference the capture control
         Dim capturectrl As CaptureCtrl = _form.CaptureCtrl

         Dim inFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_Source.avi")
         Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_CaptureImageExample.jpg")

         Try
            ' set the video capture device, use your capture 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

            ' capture the image
            Dim image As Image = capturectrl.CaptureImage()

            If Not image Is Nothing Then
               image.Save(outFile, ImageFormat.Jpeg)
            End If

            ' stop the capture
            capturectrl.StopCapture()

            ' check for the capture file and set the result
            If File.Exists(Path.Combine(Directory.GetCurrentDirectory(), outFile)) Then
               _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 Sub CaptureImage_Helper(ByVal sender As Object, ByVal e As EventArgs)
         ' set result
         _result = True
      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 void CaptureImageExample()
      {
         // reference the capture control
         CaptureCtrl capturectrl = _form.CaptureCtrl;

         string inFile = Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_Source.avi");
         string outFile = Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_CaptureImageExample.jpg");

         try
         {
            // set the video capture device, use your capture device name here
            if (capturectrl.VideoDevices["USB"] == null)
               throw new Exception("No USB video device available");

            capturectrl.VideoDevices["USB"].Selected = true;

            // capture the image
            Image image = capturectrl.CaptureImage();

            if (image != null)
               image.Save(outFile, ImageFormat.Jpeg);

            // stop the capture
            capturectrl.StopCapture();

            // check for the capture file and set the result
            if (File.Exists(Path.Combine(Directory.GetCurrentDirectory(), outFile)))
               _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();
      }

      public void CaptureImage_Helper(object sender, EventArgs e)
      {
         // set result
         _result = true;
      }

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