Personal Workbook
Excel VBA lives inside Excel workbooks. Macros can only be executed if its workbook is locally open. The personal workbook is always opened and available, and as such makes for an appropriate way to make macros or functions globally available.
Setup
Simply save an Excel file with a macro embedded to: C:\Users\USERNAME\AppData\Roaming\Microsoft\Excel\XLSTART\PERSONAL.XLSB
Troubleshooting
Personal Workbook Missing
Microsoft will periodically disable and delete your Personal Workbook. To re-enable:
In an Excel window, navigate to File > Options
In the popup, navigate to Add-ins
In a dropdown located near the bottom of the popup, select Disabled Items and Go
In the popup, select Personal Workbook and Enable
- Restart Excel