Microsoft has shown early signs that it's hoping to lure iPad developers to Windows 8 with a new design guide. The Windows Dev Center example shows the common differences in layout between an iOS app and Windows' new Metro interface, including not just the look but also how certain commands would unfold and how either would respond to gestures. Its most advanced element is an explanation of "contracts," or agreements between apps and Windows 8 that give them permission to share files or search between each other, play out to other audio sources, or toggle settings.
