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   public class Window : Form
   {
       private static Device m_graphic_device = null;
       private static Mesh mesh;    

       public Window()
       {
           this.Text = Core.GameName;
       }

       public void InitDevice()
       {
           PresentParameters param = new PresentParameters();

           param.Windowed = true;
           param.SwapEffect = SwapEffect.Discard;


           m_graphic_device = new Device(0, DeviceType.Hardware, this.Handle, CreateFlags.SoftwareVertexProcessing, param);

           //here my mesh box
           mesh = Mesh.Box(m_graphic_device, 2.0f, 1.0f, 2.0f);
       }

       public void Render()
       {
           m_graphic_device.Clear(ClearFlags.Target, Color.DarkBlue, 1.0f, 0);
           m_graphic_device.BeginScene();

           //in fact here is nothing drawn anyway...
           mesh.DrawSubset(0);

           m_graphic_device.EndScene();
           m_graphic_device.Present();
       }
   }                    

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            using (Window w = new Window())
            {
                w.InitDevice();
                w.Show();

                while (w.Created && m_run)
                {
                    Timer.Update();

                    w.Render();

                    Application.DoEvents();
                }
            }                    

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       public void Init()
        {
            PresentParameters present = new PresentParameters();
            present.SwapEffect = SwapEffect.Discard;
            present.DeviceWindowHandle = this.Handle;
            present.Windowed = true;
            present.BackBufferWidth = this.Width;
            present.BackBufferHeight = this.Height;
            present.BackBufferFormat = Format.A8R8G8B8;
            Direct3D directx = new Direct3D();
            m_device = new Device(new Direct3D(), 0, DeviceType.Hardware, this.Handle, CreateFlags.SoftwareVertexProcessing, present);

            mesh = Mesh.CreateTeapot(m_device);
            mesh.ComputeNormals();

            Material material = new Material();
            material.Diffuse = Color.FloralWhite;
            material.Ambient = Color.MidnightBlue;
            m_device.Material = material;

            m_device.SetTransform(TransformState.View, Matrix.LookAtLH(new Vector3(0,0,0),new Vector3(0,0,1),new Vector3(0,1,0)));
            m_device.SetTransform(TransformState.World, Matrix.Translation(new Vector3(0,0,-100)));
        }                    

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        public void Render()
        {
           m_device.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.WhiteSmoke.ToArgb(), 1.0f, 0);
           m_device.BeginScene();

           mesh.DrawSubset(0);

           m_device.EndScene();
           m_device.Present();
        }                    

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            material.Diffuse = Color.FloralWhite;
            material.Ambient = Color.MidnightBlue;