Multiple windows and mouseover macros

I tried searching the forums to see if anyone had noticed this behavior before, but couldn't find anything so I thought I'd share with everyone.

Am I the only one who's discovered that WOW recognizes mouseover on windows that are not "active"? I tri-box on one system with one monitor and have my windows staggered so I can see various portions of the background screens. My main (paladin) window is centered at the bottom of my screen, my healer (priest) window is in the upper left corner so the party frames are all visible behind my main window, and my DPS (warlock) is in the upper right corner. I have my healing macros set up with mouseover conditions and can mouse over a portrait on the priests window and hit my keybind and the heal targets the correct character.

For the records, I'm using AutoHotKey to pass the key strokes to all of the windows.

It might work, but I fail to see how this is that useful.

I want to be able to control all my characters without having to move my mouse over all screens for targeting. There are much faster ways of doing so without having to rely on mouseover. :P

actually it can be VERY usefull to save Action Button !

Was Dual Boxing Priest and Warrior as a Warrior for my main screen and made macro to target my Warrior and heal him but when playing with other ppl and friends you can't heal them -_- or you have to drop one in your bar and click it or do a other macro which is annoying my having a Mouse Over Heal I can just heal my Warrior Bubble and everything and don't have to mess with 10000 macro