Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Strength
ID_CA_IKSPLINE_TAG_STRENGTH
Parameter: Type
ID_CA_IKSPLINE_TAG_TYPE
Parameter: Aim
ID_CA_IKSPLINE_TAG_AIM
Parameter: Align
ID_CA_IKSPLINE_TAG_ALIGN_TANGENT
Parameter: Axis
ID_CA_IKSPLINE_TAG_ALIGN_AXIS
Parameter: Spline
ID_CA_IKSPLINE_TAG_SPLINE
Parameter: End
ID_CA_IKSPLINE_TAG_END
Parameter: Twist
ID_CA_IKSPLINE_TAG_TWIST_TYPE
Parameter: Angle
ID_CA_IKSPLINE_TAG_TWIST_AXIS
Parameter: Twist
ID_CA_IKSPLINE_TAG_TWIST_CURVE
Parameter: Add
ID_CA_IKSPLINE_HANDLE_ADD
Parameter: Create
ID_CA_IKSPLINE_HANDLE_CREATE
Parameter: Remove
ID_CA_IKSPLINE_HANDLE_REMOVE
Parameter: Index
ID_CA_IKSPLINE_HANDLE_INDEX
Parameter: Object
ID_CA_IKSPLINE_HANDLE_LINK
Parameter: Twist
ID_CA_IKSPLINE_HANDLE_TWIST
Parameter: Depth
ID_CA_IKSPLINE_HANDLE_LENGTH
Parameter: Offset
ID_CA_IKSPLINE_HANDLE_OFFSET
Parameter: Display
ID_CA_IKSPLINE_DISPLAY_MODE
Parameter: Tangent
ID_CA_IKSPLINE_DISPLAY_TANGENT
Parameter: Tangent
ID_CA_IKSPLINE_DISPLAY_TANGENT_COL