Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: Formula
FP_CONDITION_INPUT_FORMULA
Parameter: Bypass
FP_CONDITION_BYPASS
Parameter: Combine Mode
FP_CONDITION_COMBINE_MODE
Parameter: Comparison
FP_CONDITION_CMPOPERATOR
Parameter: Comparison
FP_CONDITION_GROUP_CMPOPERATOR
Parameter: Comparison
FP_CONDITION_ALIGN_CMPOPERATOR
Parameter: Link
FP_CONDITION_CMPLINK
Parameter: Value
FP_CONDITION_CMPFLOATVALUE
Parameter: Value
FP_CONDITION_CMPTIMEVALUE
Parameter: Value
FP_CONDITION_CMPVECTORVALUE
Parameter: Lower
FP_CONDITION_CMPFLOATRANGE_LOWER
Parameter: Upper
FP_CONDITION_CMPFLOATRANGE_UPPER
Parameter: Lower
FP_CONDITION_CMPVECTORRANGE_LOWER
Parameter: Upper
FP_CONDITION_CMPVECTORRANGE_UPPER
Parameter: Lower
FP_CONDITION_CMPTIMERANGE_LOWER
Parameter: Upper
FP_CONDITION_CMPTIMERANGE_UPPER
Parameter: Chance
FP_CONDITION_CHANCE
Parameter: Seed
FP_CONDITION_SEED
Parameter: Error Tolerance
FP_CONDITION_CMPERRORTOLERANCE
Parameter: FP_CONDITION_DRAW_DISTANCE
FP_CONDITION_DRAW_DISTANCE