bool MyDraw::UpdateWindow( void *pBuffer, int width, int height )
{
    HRESULT ddrval;

    if( NULL == _d3d9_device )
        return false;
    

    RECT _rc_source = { 0, 0, width, height };

   
    //  Begin the scene

    if( SUCCEEDED( ddrval = _d3d9_device->BeginScene() ) )
    {        
        IDirect3DSurface9 * back_buffer;

        ddrval = _d3d9_device->GetBackBuffer ( 0, 0, D3DBACKBUFFER_TYPE_MONO, & back_buffer );

        DWORD start = ::GetTickCount();


        //  Let DirectX handle the conversion of our input format, UYVY, to the current display mode

        if( SUCCEEDED( ddrval = D3DXLoadSurfaceFromMemory ( back_buffer,
                                                            NULL,
                                                            NULL,
                                                            pBuffer,
                                                            D3DFMT_UYVY,
                                                            1440,
                                                            NULL,
                                                            & _rc_source,
                                                            D3DX_FILTER_NONE,
                                                            0 ) ) )
        {


        }

        DWORD elapsed = ::GetTickCount() - start;
        _RPT1 ( _CRT_WARN, "Elapsed time %lu\r\n", elapsed );

        back_buffer->Release ( );
    
        //  End the scene

        _d3d9_device->EndScene();
    }

    //  Present the backbuffer contents to the display

    _d3d9_device->Present( NULL, NULL, NULL, NULL );

    return true;
}