Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: Mode
SOLIDIFYGENERATOR_MODE
Parameter: Thickness
SOLIDIFYGENERATOR_THICKNESS
Parameter: Clamp
SOLIDIFYGENERATOR_THICKNESSCLAMP
Parameter: Position
SOLIDIFYGENERATOR_POSITION
Parameter: Subdivision
SOLIDIFYGENERATOR_BOUNDARYSUBDIVISION
Parameter: Shell
SOLIDIFYGENERATOR_CREATEBOUNDARY
Parameter: Start Cap
SOLIDIFYGENERATOR_CREATEINSIDE
Parameter: End Cap
SOLIDIFYGENERATOR_CREATEOUTSIDE
Parameter: Thickness Map
SOLIDIFYGENERATOR_VERTEXMAP
Parameter: Polygon Selection
SOLIDIFYGENERATOR_SELECTION
Parameter: Selection Handling
SOLIDIFYGENERATOR_SELECTIONHANDLING
Parameter: Map Handling
SOLIFIFYGENERATOR_MAPHANDLING
Parameter: Resolve Intersections
SOLIDIFYGENERATOR_COMPLEX_RESOLVEINTERSECTION
Parameter: Optimize
SOLIDIFYGENERATOR_COMPLEX_WELDCOLLAPSED
Parameter: Perpendicular Boundary
SOLIDIFYGENERATOR_COMPLEX_FORCEPERPENDICULARBOUNDARY
Parameter: Perpendicular Boundary
SOLIDIFYGENERATOR_COMPLEX_PERPENDICULARANGLELIMIT
Parameter: Preserve Corners
SOLIDIFYGENERATOR_COMPLEX_PRESERVECORNERS
Parameter: Preserve Corners
SOLIDIFYGENERATOR_COMPLEX_PRESERVECORNERSANGLE