Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: Format
D3DEXPORTFILTER_FORMAT
Parameter: Save Templates
D3DEXPORTFILTER_TEMPLATES
Parameter: Export Textures
D3DEXPORTFILTER_TEXTURES
Parameter: Save Normals
D3DEXPORTFILTER_NORMALS
Parameter: Generate Mesh
D3DEXPORTFILTER_SAVEMESH
Parameter: Adapt Textures
D3DEXPORTFILTER_CONVERTTEXTURENAME
Parameter: Suffix
D3DEXPORTFILTER_TEXTURESUFFIX