When I use workbooks.close I can set the option SaveChanges to False, but I can't find the switch to prevent the message "Do you want to save clipboard contents to paste later?" from interrupting program flow. I did find a workaround - if you copy a single blank cell just before closing that replaces a big thing on the clipboard with a little thing that doesn't trigger the message. But I'd rather have cleaner code - what's the name of this switch?