Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: Driving Parameter
DRIVERTAG_DRIVERPARAMETER
Parameter: Use Direction
DRIVERTAG_DRIVERVECTORMODE
Parameter: Min
DRIVERTAG_DRIVERVECTORMIN
Parameter: Max
DRIVERTAG_DRIVERVECTORMAX
Parameter: X Resolution
DRIVERTAG_DRIVERGRIDX
Parameter: Y Resolution
DRIVERTAG_DRIVERGRIDY
Parameter: Clamp
DRIVERTAG_CLAMP
Parameter: Driven Object
DRIVERTAG_DRIVENOBJECT
Parameter: Mode
DRIVERTAG_MODE
Parameter: Parameter
DRIVERTAG_DRIVENPARAMETER
Parameter: Mix
DRIVERTAG_DRIVERMIX
Parameter: Relative
DRIVERTAG_DRIVERRELATIVE
Parameter: Method
DRIVERTAG_ABSMODE
Parameter: Min
DRIVERTAG_DRIVERMIN
Parameter: Max
DRIVERTAG_DRIVERMAX