Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Save Selected
ALLPLAN_SELECTED
Parameter: Triangulate
ALLPLAN_TRI
Parameter: Optimize
ALLPLAN_OTPIMIZE
Parameter: Optimize Tolerance
ALLPLAN_OPTIMIZEVALUE
Parameter: Clear Degenerated Polygons
ALLPLAN_COLLAPSED
Parameter: Color
ALLPLAN_COLOR
Parameter: Small Format
ALLPLAN_KOMPRIMIERT
Parameter: Create Log File
ALLPLAN_INFO