[vtkusers] user interface

[Gopalakrishnan, Gowri]

Dear All

I would like some opinion on the user interface that i can work with vtk. I
am using vtk on windows 
using c++. From my searches so far , i have narrowed down the choices to

GLUI
FOX 
FLTK


If any one has any experience in any of this, i would be happy to hear about
these or anyother UI .....
As of now I have no experience, therefore before I make a choice i thought
to ask in the vtk forum...

Thanks in advance
Regards
Gowri