We program worksheets i.r.o. income tax and financial calculators.
We enter formula into cells, then hide the row, and protect the worksheet /
work book to protect the intelectual property of our formulae.
To our horror we find that the standard protection is easily breached, and
our hidden formulae are then revealed, please, any suggestions?
Also we 'time expire' our programs, but again this is easily circumvented by
'rewinding' the clock, please, any suggestions?
Keepwell
Regards
roger