Issue about CFSTR_FILENAMEMAP clipboard format

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Windows

shell

I am implementing a namespace extension. When I implement the functionality on dragging a file in the namespace extension to local file system, I meet a problem.
According to the msdn,the CFSTR_FILENAMEMAP is used to rename the file names what the explorer get via HDROP clipboard format.
But the explorer does not call GetData method of the IDataObject object via CFSTR_FILENAMEMAP clipboard format.
Anybody has ever used the CFSTR_FILENAMEMAP to rename the file when user dragging a file from NSE and drop on the local file system?
How to make it work correctly?
In fact, my aim is that when user drag files from NSE and drop on the local file system, the explorer can create a folder and copy all files into the new folder.
Anybody know how to implement it?
Thanks you very much first.