[HELP]Turrent Face Position!

[lichxing]

I want a working system like this:

Time: 1:29 - 2:30

So i want my immortal to move(no lagg) with wasd, And shoot with left mouse button and turrent to always follow mouse.

I have wasd system and left mouse shoot but not with it to work turrent only face. I found this but i dont know how to make the turrent face the mouse.... SO how to i make a unit turrent face a position?

 

[Muhahahahaaa]

i have asked this already twice. the answer was that it is not possible by trigger.
one possible solution would be to create a dummy attack with no effects which is able to attack a dummy unit and only the dummy unit with no visuals. well you need to create a dummy unit everytime the turret has to move.