Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Type
FORCE_TYPEParameter: Object A
FORCE_OBJECT_AParameter: Reference Axis A
FORCE_REFERENCE_AParameter: Attachment A
FORCE_APPLICATION_AParameter: Offset
FORCE_OFFSET_AParameter: Index
FORCE_POINT_AParameter: Map
FORCE_POINT_SELECTION_AParameter: Region Of Influence
FORCE_REGION_AParameter: Shape Conservation
FORCE_POINT_SELECTION_SHAPE_CONSERVATION_AParameter: Damping
FORCE_POINT_SELECTION_SHAPE_CONSERVATION_DAMPING_AParameter: Object B
FORCE_OBJECT_BParameter: Reference Axis B
FORCE_REFERENCE_BParameter: Attachment B
FORCE_APPLICATION_BParameter: Offset
FORCE_OFFSET_BParameter: Index
FORCE_POINT_BParameter: Map
FORCE_POINT_SELECTION_BParameter: Region Of Influence
FORCE_REGION_BParameter: Shape Conservation
FORCE_POINT_SELECTION_SHAPE_CONSERVATION_BParameter: Damping
FORCE_POINT_SELECTION_SHAPE_CONSERVATION_DAMPING_BParameter: Always Visible
FORCE_ALWAYS_VISIBLEParameter: Draw Size
FORCE_SIZE