deactivate camera panning with Control key ?

Hi,
I’d like to deactivate camera panning with Control key :

I’ve got a puzzle to place opened texture file onto a 3D object, and i can use arrowkeys to precise place it.
It works when camera panning is disabled, because by default arrow keys are panning the camera.
So my idea was to disallow camera panning with some modifying keys (Ctrl, Alt, shift ?)
Here is what i have, but it does not work.

I’ve tried also to put this into an “Every frame do” puzzle : no way.

Any help, please ?