User defined functions that are installed with add-ins (reference)

Applies To
Excel for Microsoft 365 Excel for Microsoft 365 for Mac Excel 2021 Excel 2021 for Mac Excel 2019 Excel 2019 for Mac Excel 2016 Excel for iPad Excel for iPhone Excel for Android tablets Excel for Android phones

If add-ins that you install contain functions, these add-in and automation functions will be available in the User Defined category in the Insert Function dialog box.

Note

User defined functions (UDFs) aren't available in Excel for the web.

To get detailed information about a function, click its name in the first column.

Function Description
CALL function Calls a procedure in a dynamic link library or code resource
EUROCONVERT function Converts a number to euros, converts a number from euros to a euro member currency, or converts a number from one euro member currency to another by using the euro as an intermediary (triangulation)
REGISTER.ID function Returns the register ID of the specified dynamic link library (DLL) or code resource that has been previously registered

Important

The calculated results of formulas and some Excel worksheet functions may differ slightly between a Windows PC using x86 or x86-64 architecture and a Windows RT PC using ARM architecture. Learn more about the differences.

Excel functions (by category)Excel functions (alphabetical)