自已写的一个C++类。用于实现在一个单击出现颜色选择的按钮。继承于CBUtton类。使用时只要将类加到工程，并为按钮添加一个ColorPicker的控件变量即可。-Their own writing a C++ classes. There used to achieve one-click color selection button. Inherited from CBUtton class. When used as long as the class added to the proje