Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: Mode
FP_STICK_OBJECT_BEHAVIOURParameter: Contact on
FP_STICK_OBJECT_BEHAVIOUR_PROXIMITYParameter: Strength
FP_STICK_OBJECT_STRENGTHParameter: Radius
FP_STICK_OBJECT_RADIUSParameter: Consider Particle Radius
FP_STICK_OBJECT_CONSIDER_PARTICLERADIUSParameter: Switch on Contact
FP_STICK_OBJECT_CONTACTBEHAVIOUR_SWITCHGROUPParameter: Target Group
FP_STICK_OBJECT_TARGET_GROUPParameter: Create Group
FP_STICK_OBJECT_TARGET_GROUP_CREATEParameter: Mode
FP_STICK_OBJECT_ELEMENTS_INEXMODEParameter: Simulation Tags
FP_STICK_OBJECT_ELEMENTSParameter: Select Geometry to stick to
FP_STICK_OBJECT_SELECT_GEOMETRY