Defining Super_L instead of ALT (m)

Hello,

I am experimenting CTWM with adapted key bindings.

xev gives 133 for the key Super_L (win key, the key just next to alt).

I would like to ask if it would be possible to bind Super_L with F1,... F4
keys to go to given workspace?

In Xorg, WM_WINDOWS_KEY is not defined.
Maybe you would have some ideas how to make so?

# Global buttons for workspace managent.
ifdef(`WM_WINDOWS_KEY',`define(`FMOD',WM_WINDOWS_KEY :
all)',`define(`FMOD',: root)')
"F1" = Super_L : f.gotoworkspace "One"
"F2" = 133 : f.gotoworkspace "Two"
"F3" = FMOD : f.gotoworkspace "Three"
"F4" = FMOD : f.gotoworkspace "Four"
#   xmodmap -e "keycode 133 = WM_WINDOWS_KEY"

Thank you and I wish you a nice day.