Returns the Apple event code for the specified command argument of the receiver.
Original signature is '- (FourCharCode)appleEventCodeForArgumentWithName:(NSString *)argumentName'
Available in Mac OS X v10.0 and later.


- argumentName (NSString)
- The argument name (used as a key) for which to obtain the corresponding Apple event code.

The code for the specified argument.

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