[Zope] How do you permanently hide the paste button?

[Steve Nicholson]

How do you permanently hide the paste button after a cut & paste action,
but not after a copy & paste?

Is there an easy way to hide the paste button after a cut & paste
action. I have tried setting the cb_dataValid flag to 0, delete '__cp'
or set it to ''. I am sure these aren't good options. setting the
cb_datatValid flag to 0 only works when returning to the page after the
paste action. The button returns as soon as you refresh the page or go
to a new page.
Any ideas on what I need to do please.

(Running zope 2.5.1 / python 2.1.3 / win2000)
Thanks
Steve.