I had the same problem, my laptop has the separate numeric keys on the right hand side of the keyboard. Press the button Num Lock. Then hold down both the Fn and the Alt keys with your left hand and type in the ALT code you want on the keyboard (not the numbers across the top of the screen). When you release the Fn and Alt keys the symbol you want appears in your open Works document.
There is a good list of ALT codes on www.lawlessfrench.com
Rob ten Wolde