http://www.uesp.net/wiki/Morrowind:Warlock#Warlock
Google is your friend.
Also your definition of Warlock is wrong. A warlock is simply a http://en.wikipedia.org/wiki/Warlock.
Personally however, i'd go for a heavyarmor/destruction/conjuration/illusion/mysticism/restoration/enchant/alchemy build like any other generic magic user. Role playing as a Warlock will make you feel more like one than whatever skills you have.