We’ve extended our In-App Purchasing APIs for C++ Windows applications to allow developers to sell In-App features to users. The new monetization capability called In-App Unlocking API now allows developers to sell non-consumable (buy once) features, capabilities, content, or levels that are locked or hidden in the application. This new API will allow apps to monetize additional features of an application. Developers will need to add the specific features or content information to a CSV file that must be part of the application and binary and submitted to AppUp.
For more information, follow this link: http://appdeveloper.intel.com/en-us/article/application-unlock-feature.