Any way to use VBA to comment out / uncomment a standard module?

Hi All

I have this module in several workbooks

Module Name: Has_Formula

Function HasFormula(rCell As Range) As Boolean
    Application.Volatile
    HasFormula = rCell.HasFormula
End Function

I'm hoping there's a way to use the Workbook Open() event to un-comment all 4 lines
And Workbook_BeforeClose() event to comment them all back out again

Is that even possible?