That's just the point; you don't really have a way of typing it directly, because most of the characters are not normal printable/typable ASCII. The trick Eric discusses is a way to allow you to "type" arbitrary ASCII characters by way of their code in decimal. So the codes are all converted from hexadecimal to decimal.

If you fire up Hyperterminal you should be able to do the following:

- Make sure num lock is turned on.

- Make sure you're focused on your Hyperterminal window.

- Hold down ALT and type the following codes using your numeric keypad. After each code, let go of ALT and move on to the next code.

The codes:
131
69
17
217


Normally you wouldn't ever use it this way. You'd have software written capable of sending arbitrary commands, and you'd put this string of bytes into the command and have it send it automatically.