Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Align Face to Vertex Normals
NORMALTAG_ALIGN_FACE2VERTEX
Parameter: Align Vertex to Face Normals
NORMALTAG_ALIGN_VERTEX2FACE
Parameter: Swap Normals
NORMALTAG_SWAP_NORMALS
Parameter: Use Fields
NORMALTAG_USE_FIELDS
Parameter: Use Deformed Points
NORMALTAG_DEFORMEDSTATE
Parameter: Fields
NORMALTAG_FIELDS