完美地实现了树形控件中条目的拖放
................................\Debug
................................\.....\DragTree.exe
................................\.....\DragTree.ilk
................................\.....\DragTree.obj
................................\.....\DragTree.pch
................................\.....\DragTree.pdb
................................\.....\DragTree.res
................................\.....\DragTreeDlg.obj
................................\.....\StdAfx.obj
................................\.....\XTreeCtrl.obj
................................\.....\vc60.idb
................................\.....\vc60.pdb
................................\DragTree.clw
................................\DragTree.cpp
................................\DragTree.dsp
................................\DragTree.dsw
................................\DragTree.h
................................\DragTree.ncb
................................\DragTree.opt
................................\DragTree.plg
................................\DragTree.rc
................................\DragTreeDlg.cpp
................................\DragTreeDlg.h
................................\Resource.h
................................\StdAfx.cpp
................................\StdAfx.h
................................\XTreeCtrl.cpp
................................\XTreeCtrl.h
................................\res
................................\...\DragTree.ico
................................\...\DragTree.rc2
................................\...\Tree.BMP
................................\...\使 用 说 明.txt
................................\使 用 说 明.txt