Posted when the application enters context-sensitive help mode. This typically happens when the user holds down the Help key.
The notification object is the help manager. This notification does not contain a userInfo dictionary.
Available in Mac OS X v10.0 and later.


- Available in Monobjc Bridge: 10.6 (For Mac OS X 10.6 and later), 10.5 (For Mac OS X 10.5 and later)