How to insert Euro sign in OpenOffice.

Alt + 0128

Numbers must be typed in on the number pad of the keyboard.

It also works here! €


UPDATE: 11 Dec 2010
I have just discovered the above is an old way of inserting symbols and is not unicode.
To be able to add unicode symbols easily for Windows XP SP3:

1. In the registry key HKEY_CURRENT_USER\Control Panel\Input Method
   Look for a value named EnableHexNumpad
   If the value does not exist create a String value with that name.
2. Set the value of EnableHexNumpad to 1.
3. Reboot the PC.
4. Now in OpenOffice, to get the Euro symbol, hold down Alt, press + on the numpad, followed by the hexcode for Euro, then release the Alt.
   Alt + 20ac.  It works here too €

Now I can insert THB really easily too.  Unfortunately Chrome won't let me use this method.
Alt + e3f.

For more currency codes see xe.com.