Window mobile is known for smart operation system for mobile device and designed and developed by Microsoft exclusively for smartphones and mobile devices. This is one of the very popular smartphone operating system with having 7.9% sharing of the worldwide smartphone market. The currently window Mobile 6, 6.1, 6.5,7.0 os version has been released by Microsoft. This feature rich mobile platform equipped with all the essential Microsoft applications like MS Office, Outlook and Internet Explorer ,Which allows users to stay connected through Instant Messaging, Handling multiple e-mail accounts and using Social Network sites such as Facebook and Twitter. At FourOrange we offer all kind of custom window application development for Windows Mobile Platform.