Suggestion - - Hotkey shortcut to toggle between windowed/fullscreen

I play with a one monitor set-up. Yeah, i know! I've grown used to the option since playing the last few leagues of Project Diablo 2. So i hope I'm not asking for too much here..

My request is for a hotkey that can resize resolution between windowed and full screen.

In practice I'd have game window and trade site splitting my monitor screen, then hit a hotkey to switch back to full screen after trading. Saving some hassle of going through the options menu.

Maybe I'm not the only one that'd find this useful?