I mean outside Excel.
--
Regards,
Tom Ogilvy

"dug" wrote in message
ups.com...
when you say 'write a macro and decrypt it' do you mean that i can
write a macro [or xll] in C++ and implement my own
encryption/decryption? or do you mean using Excel's
encryption/decryption?

i need to be able to implement my own encryption so we can limit the
time for using the file, via some sort of license information that will
be stored in the file and USB dongle.