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private void CreateBox()
        {
            //TOP
            g_v_Box[0].Position = new Vector3(-0.5f, 0.5f, -0.5f);
            g_v_Box[0].Normal = new Vector3(0, 0, -1);
            g_v_Box[0].Tu = 0; //x
            g_v_Box[0].Tv = 0; //y

            g_v_Box[1].Position = new Vector3(0.5f, 0.5f, -0.5f);
            g_v_Box[1].Normal = new Vector3(0, 0, -1);
            g_v_Box[1].Tu = 1;
            g_v_Box[1].Tv = 0;

            g_v_Box[2].Position = new Vector3(0.5f, -0.5f, -0.5f);
            g_v_Box[2].Normal = new Vector3(0, 0, -1);
            g_v_Box[2].Tu = 1;
            g_v_Box[2].Tv = 1;

            g_v_Box[3] = g_v_Box[0];
            g_v_Box[4] = g_v_Box[2];

            g_v_Box[5].Position = new Vector3(-0.5f, -0.5f, -0.5f);
            g_v_Box[5].Normal = new Vector3(0, 0, -1);
            g_v_Box[5].Tu = 0;
            g_v_Box[5].Tv = 1;
            //near
            g_v_Box[6] = g_v_Box[5];
            g_v_Box[6].Normal = new Vector3(0, -1, 0);
            g_v_Box[6].Tu = 0;
            g_v_Box[6].Tv = 0;

            g_v_Box[7] = g_v_Box[4];
            g_v_Box[7].Normal = new Vector3(0, -1, 0);
            g_v_Box[7].Tu = 1;
            g_v_Box[7].Tv = 0;

[......................]

            g_vb_Box = new VertexBuffer(typeof(CustomVertex.PositionNormalTextured), 36, g_device, Usage.WriteOnly, CustomVertex.PositionNormalTextured.Format, Pool.Managed);
            GraphicsStream t_stream = g_vb_Box.Lock(0, 0, 0);
            t_stream.Write(g_v_Box);
            g_vb_Box.Unlock();
        }					

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            g_Material.Diffuse = Color.White;
            g_Material.Specular = Color.White;
            g_Material.SpecularSharpness = 15.0f;

            g_device.Material = g_Material;					

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            g_device.RenderState.Lighting = true;
            g_device.Lights[0].Type = LightType.Directional;
            g_device.Lights[0].Position = new Vector3(5f, 5f, -3.0f);
            g_device.Lights[0].Direction = new Vector3(0f, 0f, 0);
            g_device.Lights[0].Attenuation0 = 100f;
            g_device.Lights[0].Diffuse = Color.LightGray;
            g_device.Lights[0].Range = 0.0f;
            g_device.Lights[0].Update();					

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g_device.DrawPrimitives(PrimitiveType.TriangleList, 0, 12);
            g_device.Lights[0].Enabled = true;