Displays a file open panel and returns the selected filename.
Original signature is '- (void)chooseFilename:(NSString *)fileName'
Available in Mac OS X v10.2 with Safari 1.0 and later.


- fileName (NSString)
- The selected file name.

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