功能： 实现目录树中文件夹，文件，工程的拖动。

功能： 实现目录树中文件夹，文件，工程的拖动。-Function: the realization of the folder directory tree, documents, works of drag.

7文件拖动
res
Folder.cpp
Folder.h
FolderNameDialog.cpp
FolderNameDialog.h
FolderTree.cpp
FolderTree.h
MainFrm.cpp
MainFrm.h
MyFolder.aps
MyFolder.clw
MyFolder.cpp
MyFolder.dsp
MyFolder.dsw
MyFolder.h
MyFolder.ncb
MyFolder.opt
MyFolder.plg
MyFolder.rc
MyFolder.sln
MyFolder.suo
MyFolder.vcproj
MyFolderDoc.cpp
MyFolderDoc.h
MyFolderView.cpp
MyFolderView.h
OpenMultiFileDlg.cpp
OpenMultiFileDlg.h
Persist.cpp
Persist.h
ReadMe.txt
Resource.h
Sizecbar.cpp
Sizecbar.h
SizingTabCtrlBar.cpp
SizingTabCtrlBar.h
StdAfx.cpp
StdAfx.h
WorkSpace.cpp
WorkSpace.h