The built in clipboard class in REAL Studio is okay for 99% of the users, but some need more control. So for years we have the CarbonEventsScrapMBS class. Mainly for some special stuff like implementing services on Mac OS X.
Now with our 10.4 plugins we'll add this week two new classes: NSPasteboardMBS for Mac and WindowsClipboardMBS for Windows.
This way you can easily enumerate what is on the clipboard and read/write data to it.