class CGameUILayer :
    public CUnknown,
    public IMultiVMR9UILayer
{
public:
    CGameUILayer(LPUNKNOWN pUnk, HRESULT *phr);
    virtual ~CGameUILayer();

    // IUnknown implementation
    DECLARE_IUNKNOWN
    STDMETHODIMP NonDelegatingQueryInterface(REFIID, void**);
    static CUnknown *CreateInstance(LPUNKNOWN, HRESULT *);

    // IMultiVMR9UILayer implementation
    STDMETHOD(Initialize)(
        IDirect3DDevice9* pDevice
        );

    STDMETHOD(ProcessMessage)(
        UINT msg, 
        UINT wParam, 
        LONG lParam
        );

    STDMETHOD(Render)(
        IDirect3DDevice9 *pDevice
        );

        STDMETHOD( BeginDeviceLoss )(
                void
                );

        STDMETHOD( EndDeviceLoss )(
                IDirect3DDevice9* pDevice
                );

    // method is called by the render engine during IMultiVMR9RenderEngine::SetUILayer
    STDMETHOD(SetRenderEngineOwner)(
        IMultiVMR9RenderEngine* pRenderEngine
        );

    // obtain pointer to IMultiVMR9RenderEngine that owns this UI layer
    STDMETHOD(GetRenderEngineOwner)(
        IMultiVMR9RenderEngine** ppRenderEngine
        );

    HRESULT SetMixer( CGameMixer* pMixer );
    // private methods
private:

private:
    struct Vertex
    {
        D3DVECTOR Pos;
        float tu;
        float tv;
    };