Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: MDATA_SCULPTBRUSH_SETTINGS_DRAWMODE
MDATA_SCULPTBRUSH_SETTINGS_DRAWMODEParameter: MDATA_SCULPTBRUSH_SETTINGS_INVERT
MDATA_SCULPTBRUSH_SETTINGS_INVERTParameter: Pinch
MDATA_SCULPTBRUSH_KNIFE_PINCHParameter: Push
MDATA_SCULPTBRUSH_KNIFE_PUSH