That is essentially the difference.

Auto_Open is the original way of having a macro run at workbook startup, but
with the introduction of events in XL97, the Workbook_Open event was
introduced. Auto_Open is retained for compatibility.

--

HTH

RP
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wrote in message
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What is the diferent between Auto_Open and Workbook_Open, when I use
Auto_Open in a module and open the workbook with a macro the Auto_Open
is not runing, workbook_Open runs.

Regards Yngve