Thanks! thanks for your reply!

This code and your explanation is what I was looking for.

@bytes = unpack("U0C*", $Unicode_string);
[download]

In perluniintro, C0 and U0 prefix was mentioned several times, but I didn't understand them without explanation like you did.

It seems you saved me from confusion and from piles of printed pod papers.

I would like to keep reading unicode and pack documents.
Again, thanks for your patience.