这个只有90多行的源代码, 示意了在linux平台下, 开发图形程序的原理。由C语言写成，采用了GTK+和GDK库。在Federa 4下调试通过。-more than 90 lines of source code, hint of the Linux platform, the development of the tenets of the program. From the C language, and using the GTK GDK libraries. The Federa 4 under through debugging.