The key code to display ascii character is:
ALT+[ASCII code on Numeric pad]
You must have numlock on and hold down alt key while type the ascii value on numeric pad (won't work if you type with normal number keys at top).
Upside down question mark is ASCII code 168. So just hold down ALT key and press 168 on numeric pad
¿
Full ASCII Table at
http://www.asciitable.com
PS: I didn't read this thread before. I thought it was another ? mark thread (like the other one).
[Edited on 31-3-2004 by nasif]