You can read the the documentation, but I'm guessing you will need to close the workbook before the changes take effect.  So your choices are probably limited to:

  1. Closing the workbook at end of the program
  2. Closing it after writing, and (if need be) reading it back with Spreadsheet::ParseExcel.
s''(q.S:$/9=(T1';s;(..)(..);$..=substr+crypt($1,$2),2,3;eg;print$..$/

In reply to Re^3: Excel File Problem by liverpole
in thread Excel File Problem by joelnackman

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