I’m trying to bend something. A wire. But before I try it on the real wire, I used a cylinder. After I put the lattice all around it, subdivided to to make the curves. But when I trying to curve nothing happens. If I move the top part of the lattice, it kinda rotates the cylinder, but when I move the middle parts nothing happens. Only the top and bottom parts of the lattice actually does something.

A Lattice can only distort your mesh where the mesh has vertices. If you added a simple cylinder it has no loop cuts between the two ends, those there is no place for it to bend. Select one of the side edges of the Cylinder and add some loop cuts.

thanks, I’ll tr that