By Ragnarok.Martel 2017-05-29 07:21:02
Standard windower(and basic FFXI) doesn't support binding keys to controller buttons. Which sucks. And I asked Iryoku(a windower dev) about the possibility of ever adding controllers to the binder plugin, and he said that it probably wouldn't ever happen.
You'll need to use a third party program like joytokey, DS4Windows, or code an autohotkey script.