Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Format
VRML2EXPORTFILTER_FORMATParameter: Backface Culling
VRML2EXPORTFILTER_BACKFACECULLINGParameter: Save Animation
VRML2EXPORTFILTER_SAVEANIMATIONParameter: Keys/Second
VRML2EXPORTFILTER_KEYSPERSECONDParameter: Textures
VRML2EXPORTFILTER_TEXTURESParameter: Maximum Size
VRML2EXPORTFILTER_TEXTURESIZE