🚀 go-pugleaf

In my MS Word 5.1a help window for "Customizing Menues and Key
Assignments", it reads:

"You cannot assign a command to some single keys, including Command,
Option, Shift, Control, Space, Escape, or any letter or number key.
However, you can assign these keys in combination with other keys."

This implies that you should be able to map the key combination
"Escape-b" to the command "Move to Previous Word".  But when the
dialog box comes up with "Type the Keystroke for..." and I type
Escape, the Escape is interpreted as "Cancel" and the dialog box
disappears.  I have removed the inclusion of "Escape" for the Command
"Cancel", but that does not help.

Any ideas on how to do this mapping?

Thanks,
--Joe Mertz