The 1200 has the atheros 8316 switch chip. Therefore the following instructions would work to operate VLAN's in the switch chip itself.
http://wiki.mikrotik.com/wiki/Manual:Sw ... heros_8316
The switch chip itself (as far as I can recall) can't manage ip addresses itself so you would have to somehow pass the traffic up to the CPU port to handle it there.
If you are going all that way and losing the wire speed switching when you involve the CPU port then I would advise just bridging the ethernet ports you want (especially if you plan to use more than 5 ports as the 1200 only has one, five port switch group) then you add the VLAN's to the bridge and add the IP Address you want to the VLAN interfaces.
If you want more help with this I am sure there are plenty of people on here who can and will help. Come back with some more information on what you want to do and we can help.