Describes the cause and action for error messages.
Error Message(English)：
does not recognize user defined function
VBA User Defined Function not working in Mac Excel 2016
https://stackoverflow.com/questions/42905161/vba-user-defined-function-not-working-in-mac-excel-2016・・・
Excel UDF not appearing in drop down menu
https://stackoverflow.com/questions/22561422/excel-udf-not-appearing-in-drop-down-menu
Excel - why is my user-defined function not working?
https://stackoverflow.com/questions/38950707/excel-why-is-my-user-defined-function-not-working
#NAME? error in Excel for VBA Function
https://stackoverflow.com/questions/18830181/name-error-in-excel-for-vba-function
Create an Excel Add-In for User Defined Functions (UDF's)
https://www.myonlinetraininghub.com/create-an-excel-add-in-for-user-defined-functions-udfs
How to Create Custom User Defined Functions in Excel - Vertex42
https://www.vertex42.com/blog/excel-formulas/custom-user-defined-functions.html
User Defined Function in Excel VBA - Easy Excel Macros
https://www.excel-easy.com/vba/examples/user-defined-function.html
User Defined Functions in Excel with Visual Basic for Applications ...
https://www.youtube.com/watch?v=U89kCVwW9fs
https://www.youtube.com/watch?v=U89kCVwW9fs