conversion to csv

Hi to all,
I need to convert a file excel in a file .csv and so I use simple the save
as .csv.
My problem is that the characters like ', ŕ, ň, " are convert as a ?.
Is it possible to correct this type of "error"?
It's difficult to replace because the character: ? is various characters.
Thanks to all

I had a similar issue some time ago, and I found the solution in a
text-write program. You can download it from the link below.

JC

http://www.tushar-mehta.com/excel/s...gram/index.html