比较流行的数字电子钟，完全基于软件实现的效果，不依赖任何位图资源，可以设置背景和前景色，通过本程序你还将学到更多有用的知识点。-The number of the more popular electronic clock, based solely on the effect of software does not rely on any bitmap resources that can set the background and foreground through this prog