Channeling ability problem

[NeosDany]

The question is: How can i detect if a unit is channeling an ability or it isnt ?

Ex: Arthas Mana Drain is being channeling ... then i put my trigger of add ability : devotion aura - 5 armor to the enemy. but then Arthas gets stuned then, when it is detected and Arthas stops channeling, i remove the devotion aura from the enemy...

HELP!

 

[SwedishChef]

isnt there a stops channeling ability??

 

[Ayanami]

Just do this. Sorry about the free hand.

Events
   Every 0.05 seconds of the game
Conditions
Actions
   If (All conditions are True) then do (Then Actions) else do (Else Actions)
      If - Conditions
         Current order of triggering unit equal to channel
      Then - Actions
      Else - Actions
         Unit - Order YourUnit to Stop

 

[SwedishChef]

or use stops channeling event

 

[NeosDany]

no, the trigger i need must check if the caster is channeling cause if it is not, then i make the effects, but maybe there is no way to detect that S: