I wish to learn how to do this, but so far my search has gone without fruit. is there any manual or guide that can enable me to build an app? I have very limited knowledge of computer languages and I only know a little C++.
First you need some client such as visual studio, then you need to learn a language which can take a while. Try google or youtube tutorials. But you do get 100$ for any app you make (before a certain amount of people make apps)
GO thru these video tutorials and check whether you get an understanding!
Get a head start on building apps for Windows 8. With a series of examples, this hands-on guide takes you through the process of creating complete touch-enabled apps that respond to native sensors. Through the course of the book, you’ll learn how to work with the Windows Runtime application model while building a Bing Image Search app.
If you’re an experienced .NET developer who wants to get up to speed with Windows 8, this book provides the expertise and C# code samples you need.
Get a high-level overview of Windows 8 features—from the Start Screen to in-app features such as the Application Bar
Begin by building a simple app to retrieve Bing image search results from a web service
Learn about the components needed to complete the app, including UI design, the MVVM architectural pattern, and “tombstoning”
Take advantage of native OS features such as tiles, file pickers, and sharing requests
Examine the steps necessary to publish an app to the Windows Store
You need to expand your knowledge of computer languages and you need to learn a lot of C++. You can start your search with the following MUO article:
Have you checked the MSDN website? There are links there for developing across the entire range of MS product lines. They have links to development tools (there are free versions of many of them), materials to help you learn how to use the latest features, writing your first app, and more. This should always be your first stop about programming anything Microsoft.