Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Inputs First
GV_GROUP_INPUTS_FIRST
Parameter: Active
GV_GROUP_ACTIVE
Parameter: Protect...
GV_GROUP_LOCK
Parameter: Unprotect...
GV_GROUP_UNLOCK
Parameter: Enable
GV_GROUP_ENABLED