public void Empty() { BackBufferWidth = 0; BackBufferHeight = 0; BackBufferFormat = 0; BackBufferCount = 0; MultiSampleType = 0; MultiSampleQuality = 0; SwapEffect = 0; hDeviceWindow = IntPtr.Zero; Windowed = false; EnableAutoDepthStencil = false; AutoDepthStencilFormat = 0; Flags = 0; /* FullScreen_RefreshRateInHz must be zero for Windowed mode */ FullScreen_RefreshRateInHz = 0; PresentationInterval = 0; }