I found this useful...

[salvomic]

(11-06-2017 08:49 PM)webmasterpdx Wrote:  I read an article by Ed Shore about using a key in user mode. It turns out you can run a program (key redefinition) even while in the program editor.
...
-Donald

With the nice program of Eddie and the new public beta, that enhances the user key definitions, you can enjoy a lot...
Some new functionalities about them:

(11-07-2017 04:25 PM)Tim Wessman Wrote:  6. User key defines have been repositioned in the key handling process. They now will be done FIRST before anything else
a. Now all keys can be defined except SHIFT button, OFF and USER key.
b. Returning -1 will do NO operation in user key definition.
c. Returning -2 or less will perform default key behavior.
d. Be careful with your key definitions or you may hide some system functionality unintentionally

Salvo