Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: File Format
FBXEXPORT_FBX_VERSION
Parameter: As Text File
FBXEXPORT_ASCII
Parameter: Cameras
FBXEXPORT_CAMERAS
Parameter: Lights
FBXEXPORT_LIGHTS
Parameter: Splines
FBXEXPORT_SPLINES
Parameter: Instances
FBXEXPORT_INSTANCES
Parameter: Selection Only
FBXEXPORT_SELECTION_ONLY
Parameter: Global Coordinates
FBXEXPORT_GLOBAL_MATRIX
Parameter: Subdivision Surface
FBXEXPORT_SDS
Parameter: Triangulate
FBXEXPORT_TRIANGULATE
Parameter: Normals
FBXEXPORT_SAVE_NORMALS
Parameter: Vertex Colors
FBXEXPORT_SAVE_VERTEX_COLORS
Parameter: Vertex Maps to Vertex Colors
FBXEXPORT_SAVE_VERTEX_MAPS_AS_COLORS
Parameter: Up Axis
FBXEXPORT_UP_AXIS
Parameter: Flip Z Axis
FBXEXPORT_FLIP_Z_AXIS
Parameter: Tracks
FBXEXPORT_TRACKS
Parameter: Bake All Frames
FBXEXPORT_BAKE_ALL_FRAMES
Parameter: PLA to Vertex Cache
FBXEXPORT_PLA_TO_VERTEXCACHE
Parameter: Bound Joints Only
FBXEXPORT_BOUND_JOINTS_ONLY
Parameter: Takes
FBXEXPORT_TAKE_MODE
Parameter: Material
FBXEXPORT_MATERIALS
Parameter: Embed Textures
FBXEXPORT_EMBED_TEXTURES
Parameter: Substances
FBXEXPORT_SUBSTANCES
Parameter: Bake Materials
FBXEXPORT_BAKE_MATERIALS
Parameter: Width
FBXEXPORT_BAKEDTEXTURE_WIDTH
Parameter: Height
FBXEXPORT_BAKEDTEXTURE_HEIGHT
Parameter: Resize Textures
FBXEXPORT_BAKEDTEXTURE_RESIZE
Parameter: Format
FBXEXPORT_BAKEDTEXTURE_FORMAT
Parameter: Depth
FBXEXPORT_BAKEDTEXTURE_DEPTH
Parameter: LOD Name Suffix
FBXEXPORT_LOD_SUFFIX