4 KudoZ points awarded for this answer. Comment: "To jest akcija zapravo. Na kraju mislim trebalo bi ostaviti naprosto event. Evo o čemu se radi, kako Wikipedija objašnjava: An event in computer software is an action which can be initiated either by the user, a device such as a timer or Keyboard (computing), or even by the operating system. Developers of the software may choose to ignore or handle certain types of events with event handlers which are relevant to the program. The events are managed by a event-driven server, which connects the clients that generate events with the handlers that provide the required function. Mouse Events For example, with a pointing device such as a mouse, clicking a button triggers an "mouse click" event. The programmer would then program the software to respond to this "mouse click" event. Typical mouse events include mouse move and mouse button up/down. [1] [edit] Keyboard Events When a user presses a key on a keyboard, the program currently running would receive a keyboard "KeyDown" event along with relevent data such as which key the user pressed.[1"