What is the meta character for the Ctrl button?

In this script I have, it says press Ctrl+W+? for help, but it doesn't do anything. I looked in the script and it binds: bind ^W meta2_character. How do I make it the Ctrl button so I can do Ctrl+W? (There are some other commands that use Ctrl+W+another character/letter/number.)

Hold down the control button. Don't let go. Push the W button. Now let go of both buttons. For three keys hold down all three like in ctrl-alt-del in Windows

Another more common name for button is key.

Sounds to me like a key sequence, rather than a chord: first press ctrl-W, then question mark. Maybe.

Nope, nothing works

I thought maybe meta2_character was the wrong bind for Ctrl

Press keys Ctrl-V-W at the same time to get a ^W displayed in your terminal emulator session.