How do I display RTF Data?

FROM : Mark Williams
DATE : Fri Jul 07 00:49:36 2006

I have a window with an NSTextView. Data is read from an rtf file and 
should be displayed in this textview. The problem is that I do not 
know how to display rtf data (as it was formated when the file was 
made.) in a window. Would some one be able to help me with this?

Thank you
Mark.