Barrage ability Help

I have seen it before in tutorial or reposistory,it about using barrage to make hero attack multi target but now i cant find it plz link me to it or someone tell how to edit this ability to make it attack enemy unit,i have try change target allow to enemy but it's end up with nothing happen T_T

I have changed the data - damage per target to 0.01
Then the maximum number of targets to what you want
Area of effect to the range of the attack
Cast range 0.01
Casting time, Cooldown, Duration 0.01
Targets allowed to what you want
And the weapon type of the hero must be missile!

Thank alot man i set my attack type is instant so it wont work ^_^ after seeing ur reply i try missle and it work perfect
-I need it for my tank race map ^_^ thanks again