1. Development Environment: Visual Studio 2008 MFC
2. Runtime Environment:     .Netframework
3. Development Language:    C++
4. Main files description:

   .\CheckOut\Window1.xaml ---------------  Configuration file of WPF interface (XAML format)

          \Check.cs        ---------------  C# fileŁ¬inclding the basic classes such as Checkˇ˘iPointˇ˘Writerˇ˘Rectˇ˘iPage and so on

          \UIBase.cs       ---------------  Basic operations of UI, including drawing a point or a line, showing a page, and so on

          \Window1.xaml.cs ---------------  Interactive logic of UI, invoking a process for the synchronic magagement of UI