how to control LED array?

Hi - I'm working on a project to make an 8x8 LED array. The idea is that
the anodes in each row are tied together, and the cathodes in each column
are attached together, giving me 16 pins which I can control 64 LEDs with.
But now the only problem is making sure they get the right current/voltage?
My plan is to only have one column turned on at any given time, but then
any number of the 8 LEDs in that column could be on at that time, so things
get a little difficult. I could apply 0 and 5V then just have a current
limiting resistor on each LED, but that would be cumbersome and awkward. My
end goal is to be able to drive this with 16 pins from a microcontroller.
Hopefully I'm being somewhat clear about what I'm asking. Does anybody have
any suggestions as to how I could do this? Thanks so much,

Michael J. Noone
.

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