High Ascii characters are created by typing special key combinations on your computers numpad. That's the block of numbers on the far right of your keyboard. Hold down the Alt key on your keyboard and type the number combination on your numpad. Using the numbers along the top of your regular keys will not work.

Before trying to create any High Ascii character listed below make sure you have the Numlock turned on. Then hold down the Alt key, type in the number code on the numpad and then let go of the Alt key. Here is a small list of 'extended Ascii characters' you can create: