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

      ' set a video device first, you should use your video device name here
      If capturectrl.VideoDevices("Analog") Is Nothing Then
         Throw New Exception("No Analog video device available")
      End If

      capturectrl.VideoDevices("Analog").Selected = True

      ' reference the video capture subtypes collection
      Dim stypes As CaptureSubTypes = capturectrl.VideoCaptureSubTypes

      ' check for RGB24 subtype
      Dim i As Integer = stypes.IndexOf(Leadtools.Multimedia.Constants.MEDIASUBTYPE_YUY2)

      ' access the input via the collection indexer
      Dim cs As CaptureSubType = stypes(i)

      ' check if the collection contains this subtype 
      ' (it should we just got it with IndexOf above!)
      If stypes.Contains(cs) Then
         ' set the result to what we expect
         _result = True
      End If
   Catch e1 As Exception
      _result = False
   End Try
End Sub

public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public void IndexContainsExample()
{
   try
   {
      // reference the form capture control
      CaptureCtrl capturectrl = _form.CaptureCtrl;

      // set a video device first, you should use your video device name here
      if (capturectrl.VideoDevices["Analog"] == null)
         throw new Exception("No Analog video device available");

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

      // reference the video capture subtypes collection
      CaptureSubTypes stypes = capturectrl.VideoCaptureSubTypes;

      // check for RGB24 subtype
      int i = stypes.IndexOf(Constants.MEDIASUBTYPE_YUY2);

      // access the input via the collection indexer
      CaptureSubType cs = stypes[i];

      // check if the collection contains this subtype 
      // (it should we just got it with IndexOf above!)
      if (stypes.Contains(cs))
      {
         // set the result to what we expect
         _result = true;
      }
   }
   catch (Exception)
   {
      _result = false;
   }
}