Please see: https://docs.microsoft.com/en-us/office/dev/add-ins/excel/custom-functions-overview https://docs.microsoft.com/en-us/office/dev/add-ins/excel/cu...

Please see: https://docs.microsoft.com/en-us/office/dev/add-ins/excel/custom-functions-overview https://docs.microsoft.com/en-us/office/dev/add-ins/excel/cu... https://github.com/OfficeDev/script-lab/ https://github.com/OfficeDev/script-lab/