d3dLight.Type = D3DLIGHT_DIRECTIONAL;
    d3dLight.Diffuse.r  = 1.0f;
    d3dLight.Diffuse.g  = 1.0f;
    d3dLight.Diffuse.b  = 1.0f;
    d3dLight.Ambient.r  = 1.0f;
    d3dLight.Ambient.g  = 1.0f;
    d3dLight.Ambient.b  = 1.0f;
    d3dLight.Specular.r = 0.0f;
    d3dLight.Specular.g = 0.0f;
    d3dLight.Specular.b = 0.0f;

    d3dLight.Position     = D3DXVECTOR3(0.0f, 0.0f, 0.0f);
    d3dLight.Direction    = D3DXVECTOR3( 0.0f, 0.0f, 1.0f);

    d3dLight.Attenuation0 = 0.0f;
    d3dLight.Attenuation1 = 0.0f;
    d3dLight.Attenuation2 = 0.0f;
    d3dLight.Range = ((float)sqrt(FLT_MAX));

    // Set the property information for the first light.
    hr = d3dDevice->SetLight(0, &d3dLight);
    if (FAILED(hr))
        THROW_ERROR_AND_EXIT("d3dDevice->SetLight");

    hr = d3dDevice->LightEnable(0, TRUE);
    if (FAILED(hr))
        THROW_ERROR_AND_EXIT("hr = d3dDevice->LightEnable");