Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Format
VRML2EXPORTFILTER_FORMAT
Parameter: Backface Culling
VRML2EXPORTFILTER_BACKFACECULLING
Parameter: Save Animation
VRML2EXPORTFILTER_SAVEANIMATION
Parameter: Keys/Second
VRML2EXPORTFILTER_KEYSPERSECOND
Parameter: Textures
VRML2EXPORTFILTER_TEXTURES
Parameter: Maximum Size
VRML2EXPORTFILTER_TEXTURESIZE