A friend at the library let me copy her paper of diacritical marks and the codes to use to make them in Windows. I added the degree sign at the end of the list. These marks are handy when you are typing French, Spanish and other languages. You need to have a numeric keypad for these codes. To make the characters, press and hold the ALT key while you key in the numbers on the numeric keypad.
I hope you find this useful. Leave a comment for any additions — I can add them in a jiffy. _/\_/\_