Here is what you are searching for...........NOW you can make your own Windows 8 apps by just creating account at Microsoft Student Experience......
"http://www.microsoft.com/student"
"http://www.findyourcolony.com"
Make account and START!!!!!!!!!!!
You can Test your app after you create it AND for that you will have to make a payment according to the Microsoft Holders and as Your app is downloaded and liked as you get money!!!!!!!
START!!!!!!!!!!!!
**Visit on facebook "https://www.facebook.com/microsoftstudent"