' Ctrl+Alt+4. That's if you have a modern keyboard. Otherwise you can press and hold down Alt, while typing 0128 on the num pad. Let go of Alt and the Euro sign appears, as if by magic! '
Usually on newer keyboards, if you press Alt Gr(to the right of the space bar) and 4 you get the ' symbol. If you can see it on the 4 key you should be able to do it no problem