[vtkusers] the VTK_COMMON_EXPORT undefined?

[zhangzhijun]

After compiled the vtk4, the former program which works properly 
gives these kind of error:
 class 'VTK_COMMON_EXPORT'
c:\vtk4src\common\vtkobjectfactory.h(75) : error C2239: unexpected token ':' following declaration of 'vtkObjectFactory'
c:\vtk4src\common\vtkobjectfactory.h(75) : error C2059: syntax error : 'public'
c:\vtk4src\common\vtkmath.h(55) : error C2079: 'vtkMath' uses undefined class 'VTK_COMMON_EXPORT'
c:\vtk4src\common\vtkmath.h(55) : error C2239: unexpected token ':' following declaration of 'vtkMath'
c:\vtk4src\common\vtkmath.h(55) : error C2059: syntax error : 'public'
c:\vtk4src\common\vtkmath.h(455) : error C2653: 'vtkMath' : is not a class or namespace name
c:\vtk4src\common\vtkmath.h(458) : error C2653: 'vtkMath' : is not a class or namespace name
where is the error?

regards,
zjzhang

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