I launch the game "warcraft 3" inside VirtualBox in the "Full screen" mode. In spite of this, when you press the Left-Alt key combination + right mouse button during a game, a pop-up Ubuntu window pops up with menu items ("Maximize", "Minimize", and others). Also, when the mouse reaches the screen boundary, the mouse sticks to this position from time to time, which makes the game difficult.
How to make the Ubuntu context not inside VirtualBox?
