Mouse Enumeration Value Description MOUSE_BUTTON_1 0 MOUSE_BUTTON_2 1 MOUSE_BUTTON_3 2 MOUSE_BUTTON_4 3 MOUSE_BUTTON_5 4 MOUSE_BUTTON_6 5 MOUSE_BUTTON_7 6 MOUSE_BUTTON_8 7 MOUSE_BUTTON_LAST 7 MOUSE_BUTTON_LEFT 0 MOUSE_BUTTON_RIGHT 1 MOUSE_BUTTON_MIDDLE 2