Order ability trigger ... solution ?

I would like to run a trigger when a hero click a button ability.

I give an ability to my hero (bearform) and use the trigger:
Unit is issued an order with no target
(issue order)equal at(bearform)
...

But that won't work. I tried with defend, cyclone, ... no effect.
But if i use 'stop': that work.
Is the order string that one that is written in the *Func.txt ?
Can i create an ability with no effect except runnning my trigger (i would like to create custom trigger spells) ...
Must the spell be a non-custom ?

Please help me, i saw some map working like this.
Thank you

I don't think it can be done basically in the world editor...there may be a way around it manually. Sorry I cant really help, thats a good question.

Use warstomp, Summon Water Elemental, Thunderclap, spiritwolves, basically any summoning spell works. You can remove the summoned units as soon as they are created, and the player will never see them.

Also to test what other spells might work well, set up a map with all the heroes and put in a trigger:

"Unit Issued Order with no target,
Game - Display to all players Name of the order"

That way you can see firsthand which ones work, from my experience the best to use are summoning spells. This way you don't have to worry too much about what extra SFX will be involved. (although you can remove unwanted spell effects via the abilitydata.slk and the abilityfunc.slk, which you may very well know already).

FM_TertiaryEye