Thanx for the reply, Simon. Basically, one might say that if you have done a lot of copying in your macro, then you can clear all the memory used by the copy operations by executing CutCopyMode. If copying just small amounts, then there's no real advantage to using CutCopyMode.
Can I assume that CutCopyMode is essentially useless if no copying has been done in the macro? I mean, is it strictly related to copying processes and no others?