Fellas,
We should try to keep this simple; try the following link.
http://support.microsoft.com/support.../Q113/7/40.asp for an out-of-date but generic answer.
Life is too short to check all fonts and all symbols! But I believe that my short list of symbols above (writing in French mostly) works for all normal day to day fonts such as Arial, Garamond, Courier, Bodoni and Times New Roman. If a font supports a given symbol at all, it will always require the same code. It a font doesn't support a given symbol, eg ¾, then if you entered Alt/0190 you may get a surpise.
In NT4, FL310's click sequence is one step too long. You will find Character Map in Accessories.
Cheers, fobo.