Suspend Screen refresh with AutoLisp/VLisp?

I have a bit of code that does a bunch of DrawOrder stuff based on layer and
entity type, and it works just dandy, with one exception. every (command
"draworder") does a regen. I have tried turning off RegenAuto at the start
of my code, then doing a discrete regen and turning regenAuto back on at the
end, but what i would really like is to turn off all screen refreshes until
I am done with my DrawOrder stuff. I believe one can do this in VBA, but is
it possible to do it in VLisp, especially using the (command) approach to
DrawOrder?

Best,
Gordon