The way of holding down ALT and hitting numbers on the keypad can be used to get more than just the copyright symbol.
http://www.pictureinthesky.net/exter...sionchart.html
That's a conversion chart I made a few years ago when I was editing files on a binary level. Each column has 4 sub-columns:
Denary, (0x)Hex, (%)Binary, ASCII
Some applications you can also use ALT+184 to get a copyright symbol but this depends on the language pack Windows has been set to and the font you're using. If ALT+184 works then you can use ALT and the number in the "denary" column to get foreign characters. I've not yet got round to making a new chart...