Variables
Const MOUSE_BUTTON_BACK
MOUSE_BUTTON_BACK: 3 = 3
Const MOUSE_BUTTON_FORWARD
MOUSE_BUTTON_FORWARD: 4 = 4
Const MOUSE_BUTTON_LEFT
MOUSE_BUTTON_LEFT: 0 = 0
Const MOUSE_BUTTON_MIDDLE
MOUSE_BUTTON_MIDDLE: 1 = 1
Const MOUSE_BUTTON_RIGHT
MOUSE_BUTTON_RIGHT: 2 = 2