Enemy position debugging

I had a theory how to know enemy postion, ingame with a hack. First of all, I dont know if the game protects the memory that it uses to prevent these things. When we are playing the game, we can't know the enemy position visually.
Despite that, we could look for the enemy position adresses, then manage to render a square (DX or OpenGL dont remember what the game uses) in the position of each enemy. Could it be posible? I do not mean this for do an abuse of the game, only for learning purpose, i have always liked this kind of scene. I am awaitnig for your opinions

Let's figure out:
We do not know (visually) the enemy position, because of the black fog.
[I have done a photo but i can't post it T.T]

My theory is that our computers 'know' the enemy position, we could read the adress of enemy positions to render a square/polygonal form (with OpenGL/DX ?) on the surface of the map. Like this: (srry for my art xD, fast GIMP)
[I have done a photo but i can't post it T.T]

The possible problems are: render the squares of enemy's position with barely touching client's memory, encryption/protection of LOL client's memory, anti-hack tools of the game could spot the program that is working.

PD: can a member off staff put these 2 photos for me? I can PM the link.