How can I set up the Origin Store version of Command & Conquer: Generals to run a full HD?

As per the title, I would like to run Command & Conquer: Generals in full HD (or at very least a widescreen resolution).

I’ve tried adding the parameters -xres 1920 -yres 1080 -quickstart to the shortcut on my desktop and to the advanced launch options in Origin itself.

Neither of these methods seem to work anymore, the game still loads at the resolution set in the options.ini – changing the resolution there doesn’t seem to make any difference either.

Thanks for any help with this.