Responding to "Hide Others" Mac OS X

I am looking for a notification or callback that is similar to NSWorkspaceDidHideApplicationNotification for when a user chooses "Hide Others" in any running application. I was wondering if anyone knows of an api or has some advice in detecting the "Hide Others" action in any appli开发者_Go百科cation.

Your app delegate gets applicationWillHide: and applicationDidHide: whenever your application hides, no matter what caused it.