该源码实现当dialog窗口大小变化时，其内控件的anchor、dock等功能，这个简单的类即可用于MFC应用程序，也可用于非MFC程序，运行中，可用add、remove函数动态的对新创建的控件编辑anchor、dock属性-this source implement anchors and docking for controls when the dialog window is resized，you can use this simple class in MFC and non-MFC applications too.And you can use add/remove for dynamically created controls during running application.