yeap, that should do the trick. but make sure ur gc is powerful enough to handle the max resolution. this is because wc3 is in 3d and a lot of actions and graphics inside the game especially when u play dota. 5 vs 5, all spam spells, to be able to run it smoothly with max resolution, ur gc must be quite powerful.

so did you got to do it ? if you play warcraft with the right setting as ur monitor, for example mine is 22", it will be super clear and super sharp.