Compare images in C#

private void Button1_Click(System.Object sender, System.EventArgs e)
{
  GdPicture.GdPictureImaging oGdPictureImaging = new GdPicture.GdPictureImaging();
  double Confidence = 0;

  oGdPictureImaging.SetLicenseNumber("XXX"); // Replace XXX with a demo or commercial license key
  int ImageID1 = oGdPictureImaging.CreateGdPictureImageFromFile(""); // Opening image 1
  int ImageID2 = oGdPictureImaging.CreateGdPictureImageFromFile(""); // Opening image 2

  int TemplateID = oGdPictureImaging.ADRCreateTemplateFromGdPictureImage(ImageID1);
  oGdPictureImaging.ReleaseGdPictureImage(ImageID1);
  oGdPictureImaging.ADRGetCloserTemplateForGdPictureImage(ImageID2);
  oGdPictureImaging.ReleaseGdPictureImage(ImageID2);
  Confidence = oGdPictureImaging.ADRGetLastConfidence();
  oGdPictureImaging.ADRDeleteTemplate(TemplateID);

  MessageBox.Show("The two images are the same at: " + Conversion.Str(Confidence) + "%");
}

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
  Dim oGdPictureImaging As New GdPicture.GdPictureImaging
  Dim Confidence As Double

  oGdPictureImaging.SetLicenseNumber("XXX") 'Replace XXX with a demo or commercial license key.
  Dim ImageID1 As Integer = oGdPictureImaging.CreateGdPictureImageFromFile("") 'Opening image 1.
  Dim ImageID2 As Integer = oGdPictureImaging.CreateGdPictureImageFromFile("") 'Opening image 2.

  Dim TemplateID As Integer = oGdPictureImaging.ADRCreateTemplateFromGdPictureImage(ImageID1)
  oGdPictureImaging.ReleaseGdPictureImage(ImageID1)
  oGdPictureImaging.ADRGetCloserTemplateForGdPictureImage(ImageID2)
  oGdPictureImaging.ReleaseGdPictureImage(ImageID2)
  Confidence = oGdPictureImaging.ADRGetLastConfidence()
  oGdPictureImaging.ADRDeleteTemplate(TemplateID)

  MessageBox.Show("The two images are the same at: " & Str(Confidence) & "%")
End Sub