I've read through this post a few times and came to a different conclusion. I think Dan wants to encrypt the file in order to get it past an email filter.
KiX is able, with the help of FSO, to read binary. A search on this board should turn up some examples. On the other hand, I think there are a lot of freeware CODEC programs that could be used. Try to Google.
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Give a man a fish and he will be back for more. Slap him with a fish and he will go away forever.
