Attempts to send the message before aDate, returning YES if successful or NO if the operation times out.
Original signature is '- (BOOL)sendBeforeDate:(NSDate *)aDate'
Available in Mac OS X v10.0 and later.


- aDate (NSDate)
- The instant before which the message should be sent.

YES if the operation is successful, otherwise NO (for example, if the operation times out).

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