[vtkusers] error from the example step 6 - cone6

[segun jung]

Hi guys,
 
While I've been compling the example provided by VTK book, I simply got the unexpected error b/c not only the Cmakelists file and the directories in VC++ are well defined, but the required header file also exists. Since I'm a newbie, my understanding on VTK would not be either proper or in deep that I hope someone has the answer to let my headache be gone.
 
Here's the error: 
Cannot open include file: 'vtkBoxWidget.h': No such file or directory.
 
Thanks in advance.
 
Segun
 
 

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