VC界面编程。多视，窗口分割和切换，树视图等

这个工程是模拟了VC++的界面，有像VC++的类视图，有编辑视图，有显示视图。可以实现视图的切换-This project is to simulate the VC++ Interface, like VC++ The Class View, and Edit view, showing the view. View of the switch can be achieved