I'm playing around with the Windows 8 Developer preview, with the intention of making a Metro version of an existing product. It seems that in the Metro apps included with the preview, the toolbar is invoked by pressing the right mouse button. I'm not sure if there are other ways, I haven't discovered them if so, or found any published guidelines.
My app cannot use the right mouse button in this way (the app is fullscreen, and uses the right-mouse button), but I'd like to still use the native toolbar. How can I let my users know the toolbar is there, and how should they be able to invoke it?