I don't have a system with multiple monitors to test this out on, but does QNX not have a relative display position 
relative to other displays?  Like is there not a continuous desktop that these displays represent?  Was just wondering 
because my function to GetDisplaySize( monitor, &x, &y, &width, &height ) results with the x,y of the upper left corner 
of the monitor so I know where to position my window on Windows...

 I guess I just have to talk to the right device/display directly?