Places the receiver in context-sensitive help mode.
Original signature is '- (void)activateContextHelpMode:(id)sender'
Available in Mac OS X v10.0 and later.


- sender (Id)
- The object that sent the command.

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