For those not familiar with the Windows Phone App Studio, it allows anyone to build an app for the platform in just four steps. Even if the only code you know is Morse, you can become a developer. The app available in the Windows Phone Store was built using the App Studio. If one of your New Year's resolutions is to get down to work and build an app for your Windows Phone, you probably will want to download and install the App Studio.
To see how the Windows Phone App Studio works, check out the slideshow below. Then, click on the sourcelink below.
Windows Phone App Studio lets you build your own app step by step
1. Building an app can be done in just 4 steps
source: WindowsPhoneAppStudio, DemoApp via WMPoweruser