setting up a new keyboard modifier

I tried this in .fvwm2rc

Key i A C Iconify
Key (Windows) i A C –

The second line didn’t work, perhaps because I’m running fvwm2-2.4.15. not 2.5.X. (I got 2.4.15 a couple of years ago because RPMs were easier than compiling, but maybe I’ll try the latter now.)

I’d still be interested to try setting up a new modifier for these functions. The reference you cited suggested

xmodmap -e “keycode 115 = LeftWin”
xmodmap -e “add mod4 = LeftWin”

This failed because LeftWin is not a valid keysym. Also, I’m not sure what to replace `C’ with in .fvwm2rc to identify the new modifier.

Thanks.