how to configure vlan in my network????

hi everybody , i want to configure the vlan in my network
my network diagram is AT first ,
link -450g(router)-server-switch-all access point connected to the switch.
now can you guide me to create vlans
-at which point i will create vlan at switch or access point radio (433ah or 411)
i am new in mikrotik so kindly tell me through winbox

with best regards
suraj

http://wiki.mikrotik.com/wiki/Manual:Interface/VLAN