User Comments in Cocoa

FROM : Ruedi Heimlicher
DATE : Mon Nov 01 17:26:33 2004

Hi
Is there a possibility to set and get User Comments in Cocoa?
There is a call in carbon (PBDTGetCommentSync)  that requires a
'DTPBPtr' paramBlock structure where the 'desktop database reference
number ioDTRefNum' is needed. No idea where to get this number.
Thanks
Ruedi Heimlicher