Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: MDATA_CREATEPOLYGON_BUTTON
MDATA_CREATEPOLYGON_BUTTON
Parameter: Create
MDATA_CREATEPOLYGON_CREATE
Parameter: N-gon Subdivision
MDATA_CREATEPOLYGON_NGON_SUB
Parameter: Snap to same level like previous point
MDATA_CREATEPOLYGON_SNAPTO
Parameter: Only Select Visible Elements
MDATA_CREATEPOLYGON_VISIBLE