Hi All,

I am looking for a UDF (it can use built in windows dll's but
preferably no others).
that will work with Excel 2007 on Vista 64

I have a small collection of cells that I want to encrypt using a PW
provided by the user - maybe using something like md5.

I then want to be able to decrypt using the same PW.

I found some good examples ages ago but can't find anything that is
clear.

Anyone got any good examples / links out there?

TIA