What are the functions defined in MS Excel but not listed in function's guide ? and is it possible to customize a function through Microsoft VBA ?

there are some functions that are not listed in the functions list like: DateDif(), which Microsoft tries to hide as they provide more flexible functions.

yes, you can build a custom function in VBA and use it in your sheets.

Moreover, you can build and Add-in to use it in all your workbooks.

 

Thank you for the question

 

it a programming instructions stored, a code that can be used to eliminate the need tasks over and over again or its a looping tasks.

This function generates and expresses most of the written work .....