[vtkusers] vtkWin32RenderWindowInteractor does not interacts inside a .NET component pictureBox

[Chasan KIOUTSOUKMOUSTAFA]

I have a Microsoft Visual C++ project, trying to relate with my native C++
code with .NET components.
I'm binding a vtkWin32OpenGLRenderWindow object with PictureBox object, it
works. However there is no interaction with
rendered image inside PictureBox. It stands still. What's the point I'm
missing ? Thanks for replies.
Code is below;

Form.h
--------------------------------------------------------------------------------------------------------------------------------------------
private: System::Void button1_Click(System::Object^  sender,
System::EventArgs^  e) {
                 std::string path = "C:\\Dicom\\skull";
                 Dicom *dicom = new Dicom();
                 dicom->VolumeRender(this->pictureBox1, path.c_str());

             }
---------------------------------------------------------------------------------------------------------------------------------------------

Dicom.cpp
---------------------------------------------------------------------------------------------------------------------------------------------
void Dicom::VolumeRender( Windows::Forms::PictureBox ^pictureBox,
std::string FolderPath )
{

    vtkSmartPointer < vtkRenderer> renderer = vtkSmartPointer < vtkRenderer
> :: New();
    vtkSmartPointer < vtkWin32OpenGLRenderWindow > renderWindow =
vtkSmartPointer < vtkWin32OpenGLRenderWindow > :: New();
    renderWindow->AddRenderer(renderer);
    renderWindow->SetWindowId((HWND)((pictureBox->Handle).ToPointer()));
    renderWindow->Initialize();

    vtkSmartPointer < vtkWin32RenderWindowInteractor > iren =
vtkSmartPointer < vtkWin32RenderWindowInteractor > :: New();
    iren->SetRenderWindow(renderWindow);

    vtkSmartPointer < vtkDICOMImageReader> reader = vtkSmartPointer <
vtkDICOMImageReader >::New();
    reader->SetDirectoryName(FolderPath.c_str());
    reader->Update();

    volumeMapper = vtkSmartPointer<vtkFixedPointVolumeRayCastMapper>::New();
    volumeMapper->SetInputConnection(reader->GetOutputPort());
    volumeMapper->SetBlendModeToComposite();

    volumeColor = vtkSmartPointer<vtkColorTransferFunction>::New();
    volumeColor->AddRGBPoint(0,    0.0, 0.0, 0.0);
    volumeColor->AddRGBPoint(500,  1.0, 0.5, 0.3);
    volumeColor->AddRGBPoint(1000, 1.0, 0.5, 0.3);
    volumeColor->AddRGBPoint(1150, 1.0, 1.0, 0.9);

    volumeScalarOpacity =  vtkSmartPointer<vtkPiecewiseFunction>::New();
    volumeScalarOpacity->AddPoint(0,    0.00);
    volumeScalarOpacity->AddPoint(500,  0.15);
    volumeScalarOpacity->AddPoint(1000, 0.15);
    volumeScalarOpacity->AddPoint(1150, 0.90);

    volumeGradientOpacity = vtkSmartPointer<vtkPiecewiseFunction>::New();
    volumeGradientOpacity->AddPoint(0,   0.0);
    volumeGradientOpacity->AddPoint(90,  0.5);
    volumeGradientOpacity->AddPoint(100, 1.0);

    volumeProperty = vtkSmartPointer<vtkVolumeProperty>::New();
    volumeProperty->SetColor(volumeColor);
    volumeProperty->SetScalarOpacity(volumeScalarOpacity);
    volumeProperty->SetGradientOpacity(volumeGradientOpacity);
    volumeProperty->SetInterpolationTypeToLinear();
    volumeProperty->ShadeOff();
    volumeProperty->SetAmbient(0.4);
    volumeProperty->SetDiffuse(0.6);
    volumeProperty->SetSpecular(0.2);

    LODProperty = vtkSmartPointer <vtkLODProp3D>::New();
    int id = LODProperty->AddLOD(volumeMapper, volumeProperty, 0.0);
    LODProperty->SetLODLevel(id, 0.0);

    renderer->AddViewProp(LODProperty);

    renderer->ResetCamera();
    renderer->Render();

    renderWindow->Render();

    iren->Initialize();
    iren->Start();
}
-------------------------------------------------------------------------------------------------------------------------------------------
-- 
Chasan KIOUTSOUKMOUSTAFA
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