174 = «
175 = »
248 = °
250 = ·
From here... http://www.jimprice.com/jim-asc.htm
In order to generate extended ASCII characters from the keyboard...
1. Make sure NumLock is enabled on your keyboard.
2. Press and hold the ALT key.
3. While holding down the ALT key, enter the 3-digit decimal code for the extended ASCII character you want to generate.
4. Release the ALT key.