Can Someone guide me about using vtkRenderWindowinteractor and vtkwin32renderwinowinteractor?

Can Someone guide me about using vtkRenderWindowinteractor and vtkwin32renderwinowinteractor?
I am beginner at vtk libraries. Also I want to know about vtkHandle message2 function.
Any help will be appreciated.

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Most vtk-examples use vtkRenderWindowInteractor, so look at any of the examples on the site. Another place to start is with the documentation here: vtkRenderWindowInteractor, there is also a short list of C++ examples there.

Regarding vtkWin32RenderWindowInteractor it is a subclass of vtkRenderWindowInteractor and is usually automatically invoked by vtkRenderWindowInteractor.