Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Mode
PH_SCENE_CAL_PLANAR_MODEParameter: Axis
PH_SCENE_CAL_PLANAR_AXISParameter: Reverse Axis
PH_SCENE_CAL_PLANAR_FLIP_AXISParameter: Selection
PH_SCENE_CAL_PLANAR_TARGET_SETParameter: Create Plane
PH_SCENE_CAL_PLANAR_CREATE_SCENE_PLANEParameter: Update Calibration
PH_SCENE_CAL_PLANAR_FORCE_EXPORT