Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Type
ID_CA_SURFACE_DEFORMER_OBJECT_TYPE
Parameter: Plane
ID_CA_SURFACE_DEFORMER_OBJECT_MAP_PLANE
Parameter: U
ID_CA_SURFACE_DEFORMER_OBJECT_MAP_U
Parameter: V
ID_CA_SURFACE_DEFORMER_OBJECT_MAP_V
Parameter: Scale
ID_CA_SURFACE_DEFORMER_OBJECT_MAP_SCALE
Parameter: Initialize
ID_CA_SURFACE_DEFORMER_OBJECT_INITIAL
Parameter: Restore
ID_CA_SURFACE_DEFORMER_OBJECT_RESTORE
Parameter: Strength
ID_CA_SURFACE_DEFORMER_OBJECT_STRENGTH
Parameter: Offset
ID_CA_SURFACE_DEFORMER_OBJECT_OFFSET
Parameter: Proportional
ID_CA_SURFACE_DEFORMER_OBJECT_AREA
Parameter: Surface
ID_CA_SURFACE_DEFORMER_OBJECT_CAGE