Excel add in + dropdown list

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there are two ways :

XLAM
https://trumpexcel.com/excel-add-in/

and the Visual Studio way
https://github.com/aneejian/Change-Case-Excel-Add-In

Sideload Office Add-ins to Office on the web
https://learn.microsoft.com/en-us/office/dev/add-ins/testing/sideload-office-add-ins-for-testing
https://github.com/filippofinke/WordGPT

 

[Costas]

 

[Costas]

Dropdown list by CSV or RANGE
csv - https://support.microsoft.com/en-us...wn-lists-28db87b6-725f-49d7-9b29-ab4bc56cefc2
range - https://support.microsoft.com/en-us...settings-76a28e61-eeda-4577-a79d-2fdb8bf48a3f