[Professor Mega-Mind]

My question is : Can we manipulate magnetic fields WITH A BLACK HOLE ?  It is obvious that waves could not propagate , BUT perhaps lines of force could .  Both gravity , and electric charge , propagate thru black holes , after all .  Perhaps it would relate to neutron stars ?P.M.

[Professor Mega-Mind]

Can we manipulate dielectrics with electro-magnetic fields ?
Surprisingly , the answer is yes !
Project a very strong positive electric field onto a dielectric material .  The molecules and electrons will shift position , presenting a negative bias towards the field generator .  Reverse the field polarity in less than one microsecond .  The neg. bias facing the neg. field generator will produce a momentary repulsion before the dipoles realign to accommodate the new field .  Repeat this process continuously , and you have a sustained repulsion  similar to magnetic repulsion , but involving completely non-magnetic materials .  The shifting dipoles would , of course , generate friction heat . 
At any rate , sounds like a technology revolution to me .  Let's hear it now , Who's the Mega-Mind?
 I am !   P.M.   ( The Last Dragon )

[scientizscht (OP)]

So can we create a magnetic, electrostatic or electromagnetic field that exists eg only in a tubular shape of specific diameter and length and nowhere outside these boundaries?

More or less yes, but there are limits; fields change smoothly rather than abruptly, shielding is never perfect, fields outside of materials are subject to Laplace equation etc.

How can we achieve this with permanent magnets?

[Professor Mega-Mind]

 Magnetism is but a shadow of the electric force .  The electric force is fundamentally much the stronger of the two .  Superfast electric switching devices already exist .  Increasing their size from micro to macro would do the trick , likewise the necessary capacitors . 
 The technological and industrial applications of such devices would  be widespread , and revolutionary as well .
 Okay , go ahead and make your fortune .  Just remember to kick a bit back to old coach ! ........P.M.

[scientizscht (OP)]

Magnetism is but a shadow of the electric force .  The electric force is fundamentally much the stronger of the two .  Superfast electric switching devices already exist .  Increasing their size from micro to macro would do the trick , likewise the necessary capacitors . 
 The technological and industrial applications of such devices would  be widespread , and revolutionary as well .
 Okay , go ahead and make your fortune .  Just remember to kick a bit back to old coach ! ........P.M.

Can you elaborate please?

[Professor Mega-Mind]

Yes indeedy ! I run off at the mouth real good ! 
 Imagine a small lizard w/webbed feet .  To escape predators he can roll his legs reaal fast .  If a body of water is in the way , no problem , he just slaps them feet down hard and fast , and enough upward push is created to hold his body above the water , so predator foiled !
 The above analogy is to demonstrate that many small pushes can create a spectacular result .  It's just a matter of figuring out the trick ................P.M.

[Bored chemist]

Yes indeedy ! I run off at the mouth real good ! 
 Imagine a small lizard w/webbed feet .  To escape predators he can roll his legs reaal fast .  If a body of water is in the way , no problem , he just slaps them feet down hard and fast , and enough upward push is created to hold his body above the water , so predator foiled !
 The above analogy is to demonstrate that many small pushes can create a spectacular result .  It's just a matter of figuring out the trick ................P.M.

And would you like to answer the question now?

[Professor Mega-Mind]

          Reply # 41 , 05/09/18
This be my basic answer , however, you could do what I did in days of yore ; delve into the micro-electronics liturature and supplies parts spec.s . You could , of course track down an electronics engineer  or at least graduate student .  You could also ask yourself ; does positive repel positive , and does negative repel negative .  Continue with ; if most materials are full of dipoles , how can I use that ? If you don't let material limitations restrict your imagination , you might " do like professor do " , and come up with something , yeehaw !
....................P.M.