这本白皮书介绍了QT C++工具包。QT支持多种平台图形界面程序开发，有“一次编
写，处处编译”的说法。使用单一的源代码树和简单的重编译，能够在Windows95~XP ,
Mac OS X,Linux, Solaris,HP-UX,和其他使用X11的Unix版本下编制程序。QT应用
程序还可以编译成可在嵌入型环境中运行。QT采用统一的被称为“对象与槽”的机制进行
对象间通信。QT拥有对许多编程领域的完美支持：如2D/3D图形，国际化，XML等。
QT应用程序还可以用QT Dsigner进行可视化设计.,This White Paper has introduced the QT C++ tool kit. Supporting multiple platforms QT GUI development, there is " write once, compile everywhere"　argument. Using a single source tree and a simple re-compile, can at Windows95 ~ XP, Mac OS X, Linux, Solaris, HP-UX, and others using the X11 version of the Unix programming. QT applications can also be compiled in the embedded-type environment. QT a uniform known as the " object and groove"　mechanism for inter-object communications. QT has a lot of programming on the field of perfect support: such as 2D/3D graphics, internationalization, XML and so on. QT applications can also use QT Dsigner for visual design