Rick

The following 2007 extensions apply

*.xlsx standard Excel workbook (No code)
*.xlsb Binary file format optimized for speed
*.xlsm Marco-Enabled workbook containing code
*.xlam Macro-enabled add-in
*.xltm Macro-enabled Template
*.xltx Standard (non code) template


--
HTH
Nick Hodge
Microsoft MVP - Excel
Southampton, England
DTHIS
web: www.nickhodge.co.uk

UK Excel User Conference In Cambridge
November 28th - December 1st 2007
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"Rick S." wrote in message
...
Ref: Excel 2007
My take on the "xlsx" suffix is to define Non-macro workbooks. As an
example "xlmx" is a macro enabled workbook.

--
Regards

Rick
XP Pro
Office 2007



"jsky" wrote:

David, do you mean .xlsx?
If so, the xlsx extension seems to be what Microsoft gives it for their
new
files that are native to MS Excel 2007.

Changing the extension just in a folder by renaming the file is likely to
cause the file not to behave properly. However, if you must have the xls
file name, you are really saying that you want Excel to save the file as
the
older type of Excel. Which is easy to do.
on a file by file basis just do File, Save As, and choose file type to by
Excel 97-2003. You can also make this the default way you want your
files
saved (MS calls it "compatability mode") by clicking the Office Button
(circle in the top left corner of Excel) and click Excel Options at the
bottom of the openned window. Then click the SAVE label on the left and
the
1st option on the page to the right is "Save files in this format:".
Select
from the drop down box "Excel 97-2003 workbook (*.xls).

Hope I am answering what you are asking.

"David" wrote:

When I create a new excel workbook the file is given the extention of
.xsls.
This file extention is an excuitavble file and wil be blocked by many
servers. How do I change the extention name? How so you change the
default
setting to .xls?
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David