[quote='daviddoran',index.php?page=Thread&postID=69 527#post69527]And it clicks in the same spot on all windows (relatively speaking of course)? How would this work if one window is widescreen and the others are standard? [/quote]
I just spent about fifteen minutes comparing WoW windows at different resolutions and the answer is pretty complicated because different kind of objects scale in different ways. The relative sizes and positions of objects to each other inside the windows is different, and the cropping (margins) of different types of objects is different, so getting this to work is tricky.

On the other hand, HotkeyNet has a ton of options for how it adjusts for differences in screen size. (Check them out [url='http://hotkeynet.com/ref/mouseclick.html']here[/url].) So there are a lot of tools to work with.

One way to deal with the situation might be to set WoW to resolutions that have the same aspect ratio (same shape) on all your monitors, then adjust them as necessary with Maximizer or similar program (HotkeyNet does this just like Maximizer). I haven't tested this but it might make everything exactly proportional. If so, HKN's default mouse scaling will work perfectly.

If you want to keep the windows set to different aspect ratios, it gets trickier because different types of objects scale in different ways. You'll be able to set things up so the mouse translates correctly for one type of object (the 3D background, for instance) but not another (the toon circle-thingie in the upper left, for example). The hotbar across the bottom (sorry if that's the wrong name for it) is a particular problem because it has different margins at different aspect ratios. If you want to click on that, I'll probably have to add a new scaling option that calculates positions from the center of the screen rather than the upper left corner.