Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: Use Transfer
ID_TAGFIELD_ENABLE
Parameter: Transfer Mode
ID_VERTEXMAP_TRANSFER_MODE
Parameter: Invert
ID_TAGFIELD_INVERT
Parameter: Use Deformed Points
ID_TAGFIELD_DEFORMED
Parameter: Fields
ID_TAGFIELDS