I believe they are used in conjunction with SourceSafe, if you
have that installed on you machine.


--
Cordially,
Chip Pearson
Microsoft MVP - Excel
Pearson Software Consulting, LLC
www.cpearson.com


"Gary L Brown" wrote in message
...
I believe they are used for keeping track of versions of a
workbook and
identification of the user.
HTH,
--
Gary Brown

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"Will" wrote:

What is the Check In and Check Out command buttons used for?