Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: Albedo Pass
VP_DENOISER_ALBEDO_TYPE
Parameter: Use Multi-Passes
VP_DENOISER_USE_PASSES
Parameter: Save the raw image on a separate layer
VP_DENOISER_ADDRAWLAYER