继承CEditTreeCtrl，CEditTreeCtrlEx类，创建带有编辑、拖放功能,Succession CEditTreeCtrl, CEditTreeCtrlEx categories, create with editing, drag-and-drop feature

用于实现VC++中树控件的编辑功能，方便用户对采用树控件实现界面编程。-VC++ editing functions for realizing the tree control, user-friendly programming interface using the tree controls to achieve.