IDirect3DViewport::DeleteLight
HRESULT DeleteLight(LPDIRECT3DLIGHT lpDirect3DLight);
Removes the specified light from the list of Direct3DLight objects associated with this viewport.
·Returns D3D_OK if successful, or an error otherwise, which may be one of the following values:
lpDirect3DLight
Address of the Direct3DLight object that should be disassociated with this Direct3DDevice object.