c4d_objects/description/tooledgesmooth.hParameters are accessed with cinema::C4DAtom::GetParameter() and cinema::C4DAtom::SetParameter(). See Parameters.
Parameter: Iterations
MDATA_EDGESMOOTH_STEPSParameter: Keep Spacing
MDATA_EDGESMOOTH_KEEPSPACINGParameter: Select Outline
MDATA_EDGESMOOTH_SELECTOUTLINE