Can I use Flash to save data as a CSV file?

Can I use Flash to save data as a CSV file?
I want to build a desktop application that reads in a CSV file and outputs a CSV file.
Can I do the writing in Flash?
(I've read that I can do the reading in.)

Or do I need a 3rd party tool?
If so: which one?

I haven't looked into Flex properly yet, but it allow me to do what I want to do?

Thanks.


OM