Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: PREF_THEME_TYPE
PREF_THEME_TYPE
Parameter: PREF_THEME_BMP
PREF_THEME_BMP
Parameter: PREF_THEME_BMPPIC
PREF_THEME_BMPPIC
Parameter: Live Refresh
PREF_THEME_LIVE
Parameter: Reset...
PREF_THEME_RESET