How to enable/disable/control maintenance mode from backend?

How to enable/disable/control maintenance mode from backend?

sqlplus apps/*****

select fnd_profile.value('APPS_MAINTENANCE_MODE') from dual;

sqlplus apps/apps @$AD_TOP/patch/115/sql/adsetmmd.sql ENABLE

sqlplus apps/apps @$AD_TOP/patch/115/sql/adsetmmd.sql DISABLE