The horizontal coordinate of the mouse cursor or joystick.
With the mouse, valid values run from 0 to the number of horizontal pixels, or -1 if the position is unknown. With the joystick the value runs from -1000 to 1000, with 0 representing the joystick in the center position
The following displays the value of x for the mouse:
<text sometext>
/ items= ("mouse x position = <% mouse.x %>")
</text>
The following displays the value of x for the joystick:
<page somepage>
joystick x position = <% joystick.x %>
</page>