int main(int argc, char* argv[])

{

   // Verify input arguments

   if ( argc !=  )

   {

      std::cout << "Usage: " << argv[]

      << " FolderName" << std::endl;

      return EXIT_FAILURE;

   }

   std::string folder = argv[];

   // Read all the DICOM files in the specified directory.

   vtkSmartPointer<vtkDICOMImageReader> reader =

      vtkSmartPointer<vtkDICOMImageReader>::New();

   reader->SetDirectoryName(folder.c_str());

   reader->Update();

   // Visualize

   vtkSmartPointer<vtkImageViewer2> imageViewer =

      vtkSmartPointer<vtkImageViewer2>::New();

   imageViewer->SetInputConnection(reader->GetOutputPort());

   // slice status message

   vtkSmartPointer<vtkTextProperty> sliceTextProp = vtkSmartPointer<vtkTextProperty>::New();

   sliceTextProp->SetFontFamilyToCourier();

   sliceTextProp->SetFontSize();

   sliceTextProp->SetVerticalJustificationToBottom();

   sliceTextProp->SetJustificationToLeft();

   vtkSmartPointer<vtkTextMapper> sliceTextMapper = vtkSmartPointer<vtkTextMapper>::New();

   std::string msg = StatusMessage::Format(imageViewer->GetSliceMin(), imageViewer->GetSliceMax());

   sliceTextMapper->SetInput(msg.c_str());

   sliceTextMapper->SetTextProperty(sliceTextProp);

   vtkSmartPointer<vtkActor2D> sliceTextActor = vtkSmartPointer<vtkActor2D>::New();

   sliceTextActor->SetMapper(sliceTextMapper);

   sliceTextActor->SetPosition(, );

   // usage hint message

   vtkSmartPointer<vtkTextProperty> usageTextProp = vtkSmartPointer<vtkTextProperty>::New();

   usageTextProp->SetFontFamilyToCourier();

   usageTextProp->SetFontSize();

   usageTextProp->SetVerticalJustificationToTop();

   usageTextProp->SetJustificationToLeft();

   vtkSmartPointer<vtkTextMapper> usageTextMapper = vtkSmartPointer<vtkTextMapper>::New();

   usageTextMapper->SetInput("- Slice with mouse wheel\n  or Up/Down-Key\n- Zoom with pressed right\n  mouse button while dragging");

   usageTextMapper->SetTextProperty(usageTextProp);

   vtkSmartPointer<vtkActor2D> usageTextActor = vtkSmartPointer<vtkActor2D>::New();

   usageTextActor->SetMapper(usageTextMapper);

   usageTextActor->GetPositionCoordinate()->SetCoordinateSystemToNormalizedDisplay();

   usageTextActor->GetPositionCoordinate()->SetValue( 0.05, 0.95);

   vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =

      vtkSmartPointer<vtkRenderWindowInteractor>::New();

   vtkSmartPointer<myVtkInteractorStyleImage> myInteractorStyle =

      vtkSmartPointer<myVtkInteractorStyleImage>::New();

   myInteractorStyle->SetImageViewer(imageViewer);

   myInteractorStyle->SetStatusMapper(sliceTextMapper);

   imageViewer->SetupInteractor(renderWindowInteractor);

   renderWindowInteractor->SetInteractorStyle(myInteractorStyle);

   imageViewer->GetRenderer()->AddActor2D(sliceTextActor);

   imageViewer->GetRenderer()->AddActor2D(usageTextActor);

   imageViewer->Render();

   imageViewer->GetRenderer()->ResetCamera();

   imageViewer->Render();

   renderWindowInteractor->Start();

   return EXIT_SUCCESS;

}