Setting Game Result Stats

I'm having a problem trying to set the game results with triggers. Basically, I'm using a trigger to control a spell, so when this spell kills a building (for example), no player has actually killed the building; only the trigger, and thus, the player doesn't get 1 added to his 'Buildings Razed' statistics at the end of the game.

I tried doing this:

Player - Set (Owner of (Triggering unit)) Game result to (((Owner of (Triggering unit)) Structures Razed) + 1)

but it didn't work properly. So I was wondering if anyone else knew a way of using triggers to add 1 to the 'Buildings Razed' that worked.

or you can make an invisible unselectable unit to kill the building if the damage of the spell is > current hp of the building