Quote Originally Posted by Ellay
Windows meaning on 1 PC or 3 PC's?

If 1 PC the popular method has been Auto Hot Key which can be found in the Hardware/Software section.

If seperate PC's, there are a number of software options such as Synergy w/ Broadcasting or Multibox to name a few. All found in Hardware/Software section.
Just to mention it he did say "like AHK" so chance is he heard of both that and that Blizzard can decide to ban it at any given time.

Now Mufar, the closest you could get is alt+tabbing with it, which works OK with dualboxing but might be a serious issue in tripple boxing, as it'd require a delay (to wait for alt+tab to function) between the spells of 2nd and 3rd account.. I'd take my chances with AHK over that.