Windows Phone 8 development from a Windows 8 developer's perspective
This article explains some of the similarities and differences in developing apps for Windows 8 and Windows Phone 8.
If you're a Windows 8 developer, it's quick and easy to apply your skills to Windows Phone 8 development. This article will highlight some of the differences in the platforms, and will help you port your Windows 8 applications to Windows Phone 8, and create new applications targeting Windows Phone. Note that many of the topics covered in this article have much more information available than is provided, so when possible links to longer, more detailed descriptions will be provided.
If you're already a Windows 8 developer, you probably already have the latest version of Visual Studio. If you don't, or if you're running a Visual Studio Express Edition, you'll need to download either Visual Studio 2012 Express for Windows Phone or the Windows Phone SDK for Visual Studio 2012.
While both of these options come with a simulator, you'll get a better idea of how your app works in real time if you use a real device. Nokia and Microsoft both offer on site and off site test devices that you can use to test your application (MICROSOFT and NOKIA links).
Why isn't it natively supported?
How can I use it?
(More Info Link)
There are many important differences to note between the Windows Phone and Windows 8 developer offerings. The first is the price of a subscription - Windows 8 Developer Subscriptions typically cost about $50/year, while Windows Phone Developer Subscriptions cost around $100/year. Unless you're lucky enough to get a discount on your Dev Center subscription, the easiest way to offset the cost of a subscription is to purchase it through Nokia. By visiting http://www.developer.nokia.com/Developer_Programs/Lumia_developer_program.xhtml, you can get a subscription to the Widows Phone Dev Center, a license for the Windows Phone Telerik RadControls, 1 million Buddy.com API calls/month, and 2 Nokia Tech support tickets for that same $99.
Windows Phone Dev Center vs. Windows Dev Center
Once you log into your Dev Center Dashboard at https://dev.windowsphone.com/en-us/dashboard, you'll see that the Phone dashboard is slightly different than the Windows dashboard. You can submit an app using the "Submit App" link in the top left, and other links on the page are self-explanitory.
Windows Phone's WinRT implementation supports many of the same features that the Windows 8 Runtime does, although by rule of thumb the Windows 8 Runtime will usually contain more features than the Windows Phone Runtime. http://msdn.microsoft.com/en-us/library/windowsphone/develop/jj207212(v=vs.105).aspx#BKMK_winrtAPIadoptedfromwin_8_client contains a list of APIs that have been migrated from the Windows to the Windows Phone Runtime. Phone-only APIs are available in the Windows.Phone namespace, and you can see a list of them at http://msdn.microsoft.com/en-us/library/windowsphone/develop/jj207212(v=vs.105).aspx#BKMK_PhoneonlywinprtAPI.
(full documentation at http://msdn.microsoft.com/en-us/library/windowsphone/develop/jj207212(v=vs.105).aspx)
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