SFML Dynamic object, how to remove it?

Question

C++ / C#

Roughly speaking, there is a dynamic rectangle object, I draw it in window.draw(*rectangle). By pressing the "W" button, it is deleted, everything would be fine, but how to remove it from drawing, that is, programs cannot draw a remote object, which is not necessary. But how to remove it from window.draw()? Because this is the whole mistake.

Answer 1

Add check for null pointer