Force Observers?

Is there a way to force a player to become an observer during the game? Will just defeating him and telling him to press continue work?

... just kill all of his units and zero his resources.

I don't think that will give him/her the same effect.

observer is integer player state.

SetPlayerState(Player(1),PLAYER_STATE_OBSERVER,1)

any non zero will make player observer
zero will turn him back

function possibly typed incorrect dont have any jass tool to test.

It works thank you, + rep.