Sorry, the euro sign came out as a ? so it looks like the PC forum can't show the euro symbol, but it should be on the number 4 key along the top row. Although as Powerless says it is Alt+0128. You must have "Num lock" on to use the keypad though.
Press Alt Gr which is on the right of the space bar and the number 4 key along tho top of the alpha keys and you get a ?. At least you do with my Microsoft Internet key board. I don't know if other key boards work like this, but its worth a try.