title: WPF Press any button to continue to next page
body: <p>Got a simple 3 page program, but would like to make a welcome screen that users have to press a button to move to the next page (and start the workflow).
  Users will mostly be using a barcode scanner (captures string &amp; hits enter), so I'm trying to avoid buttons that need to be clicked with a mouse.
  The setup is basically one MainWindow with a DockPanel in it with a Frame in it. 
  Pages get loaded to the frame on events(the enter being hit on a textbox). Pages have Grids in them with the standard controls.
  I've got the frame in the window navigating to the welcome page, but can't seem to capture a keypress.
  What would set I the event on? The Window, the frame, the dockpanel, the page, the grid?
  Also, is there a way to specify "any key or click" event, maybe listen for any input action?
  I've tried experimenting and looking at documentation but I can't seem to get it.</p>