Example 1
x = Controller.Axis(0).Number ' x will be assigned 0
x = Controller.Axis(1).Number ' x will be assigned 1

Example 2
Dim xAxis As MPXCtl.Axis
Dim yAxis As MPXCtl.Axis
Dim xyMotion As MPXCtl.Motion

Set xAxis = Controller.Axis(5)
Set yAxis = Controller.Axis(3)
Set xyMotion = Controller.Motion(2)

' ...

' Use Axis.Number property to change a Motion object's axis
' without having to explicitly specify the axis numbers
xyMotion.Axes = Array(xAxis.Number, yAxis.Number)