The IDirect3DViewport2::LightElements method is not currently implemented.
HRESULT LightElements(
DWORD dwElementCount,
LPD3DLIGHTDATA lpData
);
Windows NT: Use version 5.0 or later.
Windows: Use Windows 95 or later. Available as a redistributable for Windows 95.
Windows CE: Unsupported.
Header: Declared in d3d.h.
Import Library: Use ddraw.lib.