Is your plant against a wall, so you are espaliering it? Here is a site for a tree pruned according to that. http://en.wikipedia.org/wiki/Espalier It doesn't talk specifically about apricots, but it may be helpful to you. One thing you don't want, are limbs laying across each other, for they will rub when they get bigger and allow a place for bugs/diseases to enter. Make sure inbetween cutting of limbs, that you dip your pruners into 10% bleach, 90% water mixture, so you don't move any unknow pathogens around. This is good to do for every limb, but even more importantly, when you go to a different tree.
Wanted to add that you can prune after it blooms, that way you will know where the fruit is and prune accordingly, but most people prune in the fall when dormant or early (feb/mar, here in N. Idaho) before it sets out leaves..