Public Overridable Property ShowDialogPreview As Boolean

Dim instance As CaptureCtrl
Dim value As Boolean
 
instance.ShowDialogPreview = value
 
value = instance.ShowDialogPreview

public virtual bool ShowDialogPreview {get; set;}

public:
virtual property bool ShowDialogPreview {
   bool get();
   void set (    bool value);
}

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

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

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

            ' set the target file and format
            _capturectrl.TargetFile = outFile
            _capturectrl.TargetFormat = TargetFormatType.AVI

            _capturectrl.FrameRate = 5 ' 5 frames per second
            _capturectrl.UseFrameRate = True
            _capturectrl.TimeLimit = 10 ' just 10 seconds of capture time
            _capturectrl.UseTimeLimit = True

            If _capturectrl.IsModeAvailable(CaptureMode.Video) Then

               ' set show dialog preview, the preview mode will be enabled when ShowDialog is invoked
               _capturectrl.ShowDialogPreview = True

               ' enable the preview
               _capturectrl.Preview = True

               ' subscribe to the started event
               AddHandler _capturectrl.Started, AddressOf CaptureCtrl_Started

               ' check the video capture dialog properties if available
               If _capturectrl.HasDialog(CaptureDlg.TargetFormat) Then
                  _capturectrl.ShowDialog(CaptureDlg.TargetFormat, _form)
               End If

               ' start capture
               _capturectrl.StartCapture(CaptureMode.Video)

               ' get the show dialog preview
               Dim ShowDialogPreview As Boolean = _capturectrl.ShowDialogPreview

               ' set the result to what we expect
               _result = (ShowDialogPreview AndAlso _capturectrl.Preview)
            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

      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 17\Media"
End Class

public bool _result = false;
      public CaptureCtrlForm _form = new CaptureCtrlForm();
      // capture control
      CaptureCtrl capturectrl;

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

      public void ShowDialogPreviewExample()
      {
         // reference the capture control
         capturectrl = _form.CaptureCtrl;

         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 video and audio compressors
            capturectrl.VideoCompressors.Mpeg2.Selected = true;

            // set the target file and format
            capturectrl.TargetFile = outFile;
            capturectrl.TargetFormat = TargetFormatType.AVI;

            capturectrl.FrameRate = 5;
            // 5 frames per second
            capturectrl.UseFrameRate = true;
            capturectrl.TimeLimit = 10;
            // just 10 seconds of capture time
            capturectrl.UseTimeLimit = true;


            if (capturectrl.IsModeAvailable(CaptureMode.Video))
            {
               // set show dialog preview, the preview mode will be enabled when ShowDialog is invoked
               capturectrl.ShowDialogPreview = true;

               // enable the preview
               capturectrl.Preview = true;

               // subscribe to the started event
               capturectrl.Started += CaptureCtrl_Started;

               // check the video capture dialog properties if available
               if (capturectrl.HasDialog(CaptureDlg.TargetFormat))
               {
                  capturectrl.ShowDialog(CaptureDlg.TargetFormat, _form);
               }

               // start capture
               capturectrl.StartCapture(CaptureMode.Video);

               // get the show dialog preview
               bool ShowDialogPreview = capturectrl.ShowDialogPreview;

               // set the result to what we expect
               _result = (ShowDialogPreview && capturectrl.Preview);
            }

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

      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 17\Media";
}