Informs the receiver that the user has released the left mouse button.
Original signature is '- (void)mouseUp:(NSEvent *)theEvent'
Available in Mac OS X v10.0 and later.


- theEvent (NSEvent)
- An object encapsulating information about the mouse-up event.

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