CorelDRAW Graphics Suite X5 :: Assigning Grab To Button On Wacom Intuos 4 Pen

Is it possible to assign a "grab" command to the button on the Wacom Intous 4 pen?

At the moment in Painter 12 and Artrage, if I hold down the button closest to the tip on the pen, then press the pen to the pad and drag, it will grab the canvas and allow me to move it around the screen. I cannot figure out how to set this up in Corel Draw X5

btw, its specifically Draw, not Photo Paint that I want to set this up in