控件变成，详细讲述空件编程的方法，理论和实际操作过程-controls into detail about empty pieces of programming methods, theoretical and practical course

选择颜色的Button控件，经过我的改写，支持空值颜色．-choose colors Button Controls, I have rewritten to support empty colors.

VC产生随机数，并绘制实时曲线，要求：每组产生十个或二十个，产生80时，清空，并能控制产生速度。-VC generate random numbers, and draw real-time curve, requirements: each produce ten or twenty, resulting in 80 when empty, and can control the generation rate.

tab实现属性页的操作 没有用外加的类 只需要系统体空的控键就可以了,(TAB to realize the operation of the property page Use plus class only require the system to the body empty control button is ok,)