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Macro-Enabled Workbook File Format

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A new security feature introduced in Excel 2007 was the new ".xlsm" macro-enabled workbook file format. 

Saving files in the default ".xlsx" Excel 2007 file format will cause all VBA code associated with the file to be discarded.  If you attempt to do so, you will receive the following error message:

To save your file in the macro-enabled format, choose "Save As... Excel Macro-Enabled Workbook" from the Office Button menu, then give the file a name using the .xlsm file extension as prompted.

 

 

 

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