Replaces the current selection with mixed text and markup.
Original signature is '- (void)replaceSelectionWithMarkupString:(NSString *)markupString'
Available in Mac OS X v10.3.9 and later.


- markupString (NSString)
- The markup string that replaces the current selection.

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