Hello
I'd like to test using only EXCEL (2000) worksheet functions whether a cell is containing a formula (something starting with '=').
The idea behind is to define a format condition to highlight the cell if the user is overwriting it , destroying the formula.

I know how to do it with VBA but this forces me to define a VBA macro in the workbook. So I'd like to do it using only EXCEL worksheet functions, if possible

Thank you in advance

Jérome