Refresh Excel VBA Function Results

Question

How can I get a user-defined function to re-evaluate itself based on changed data in the spreadsheet?

I tried F9 and Shift

Answer 1

You should use Application.Volatile in the top of your function:

Function doubleMe(d)
    Application.Volatile
    doubleMe = d * 2
End Function

It will then reevaluate whenever the workbook changes (if your calculation is set to automatic).