VC++窗口视图缩放的源代码，一个用VC6开发的图形数据支持系统，其中的难点正在于理解坐标系统的含义、各种映射模式的意义以及与逻辑坐标的转换，这个小程序将逐一进行演示和注释。

-VC++ window view of scaling the source code, a use VC6 development of the graphical data to support the system, in which the difficulty is in understanding the coordinate system of meaning, a variety of mapping patterns of meaning and the logical coordinates of the conversion, this little program will individually demonstrate and comments.