Selecting objects in the center of the screen

Hi, i have a game with a crosshair in the center of the screen, and i want to select items in game by clicking on them with that crosshair. I know how to do it with mouse cursor, but when cursor is invisible i dont know where it is. Do you know any solution ? Maybe freeze cursor in the center of the screen or something. Thanks!

Do i have to have a camera on my pawn ? I’m new to UE4 and I’m using pawn from unreal demo Realistic Rendering. And should I do it in level blueprint or pawn or player controller ? Thanks