Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Mode
PH_SCENE_CAL_POS_MODEParameter: Frame
PH_SCENE_CAL_POS_FRAME_NUMParameter: P.X
PH_SCENE_CAL_POS_X_COORDParameter: P.Y
PH_SCENE_CAL_POS_Y_COORDParameter: P.Z
PH_SCENE_CAL_POS_Z_COORDParameter: Target
PH_SCENE_CAL_POS_TARGET_0Parameter: Update Calibration
PH_SCENE_CAL_POS_FORCE_EXPORT