Input action => Any Key?

So I’d like to have my splash screen respond to any keyboard/gamepad key press. Unfortunately I’m not seeing any type of “Any Key” option inside the Input window. Is there some way I can accomplish this without binding every single keyboard/gamekey under a single input action?

I think you can’t do this in Blueprint, because we haven’t a Press Any Key Event (I’ve UE 4.5).

If you use C++:

Maybe use this :