Mouse over mesh in FP template.

There are a lot of threads about this but I cant get it to work.
What I am after is when I mouse over a mesh in the viewport I want the crosshairs to change to a hand, then when clicking on the mesh the mouse is over, something happens, well anything. I put this in the level blueprint, the FP hud and then tried it in the FP controller with no success. Any help appreciated.