压缩包中的实例程序，展示了怎样使得自己的Combox和ListBox控件具有颜色控制功能，比如控件的背景色变化，以及控件中的字体颜色等。-contained within the sample program, What makes display their Combox and ListBox controls with color control functions, For example, control the background color changes, and to con