Starts the search for a misspelled word in stringToCheck starting at startingOffset within the string object.
Original signature is '- (NSRange)checkSpellingOfString:(NSString *)stringToCheck startingAt:(NSInteger)startingOffset'
Available in Mac OS X v10.0 and later.


Returns the range of the first misspelled word.

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