Microsoft Office Tutorials and References
In Depth Information
Figure 23-4: You see this warning when the VBA window is open and a workbook contains macros.
Perhaps the best way to handle macro security is to designate one or more folders as trusted locations. All work-
books in a trusted location are opened without a macro warning. You designate trusted folders in the Trusted
Locations section of the Trust Center dialog box.
Saving Workbooks That Contain Macros
If you store one or more VBA macros in a workbook, you must save the file with macros enabled. This is a file
with an XLSM extension (or XLAM extension if it's an add-in). This file format is not the default format, so
you need to make sure that you save the file with the correct extension.
For example, assume that you create a new workbook containing one or more macros. The first time you save
the workbook, the file format defaults to XLSX, which is a file format that cannot contain macros. Unless you
change the file format to XLSM, Excel displays the warning shown in Figure 23-5. You need to click No and
then select Excel Macro-Enabled Workbook (*.xlsm) from the Save as Type drop-down list.
Be careful because Excel makes it very easy to accidentally delete all your macros with
a single button click. If you accidentally click Yes instead of No (or press Enter), Excel
deletes the macros from the saved workbook. The macros are still available in the copy
that you're working on, however. So if you catch your mistake, it's still not too late to
resave the workbook with an XLSM extension.
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