In Word, type the apostrophe "'" and move the cursor to the back of it, then press "Alt+X": 0027
Alternatively, type the apostrophe "'", highlight it and click Insert-Character (symbol? I am not sure 'cause I am running on Chinese Word). A window pops up to show you the HEX/decimal code.
Hope this helps.
I've tried google and I see several codes %20(space), %40 (@), etc. but I can't find the apostrophe.
[Edited at 2005-12-06 20:48]