There's a couple of Accessability features of Windows. One is that you can get an on-screen clickable-image of a keyboard. The other is "sticky keys".
You can (at least I could) get to stick-keys by simply holding down a key too long. If I paused whilst typing, with a finger on Shift the lunatic computer would think I wanted sticky-keys. In older Windows, there was a bug in the code to allow you to not enter the "sticky" behaviour, so it was really annoying if you don't want it. Currently I think it is OK. So once set up, you hold a key until it "sticks" (like you pressed AltGr) and then press the next needed key (which you can also make stick if wanted). So, for me, with my UK keyboard, it is AltGr-4, unlike Peter.
There used to be some add-on "foot pedals" you could get (long ago). So you could use your feet for shift, alt, etc. I have no clue if they are still made, but I'd expect so.
Joined: 03 Oct 2009 Posts: 1786 Location: Bloomington, IL
I assume that you're using Word.
Type 20AC (if the previous character is 0-9 or A-F, you must have a space before this string). Press ALT-X (this is doable with one hand; I know because I have very limited use of my left hand). Unless the font is something exotic like Webdings, that should generate €.