The Signal Forms are enumerated values
Fig.Plot(1..10).Signal(1..10).Type = eForm
eForm: (Enumeration) Line, Spline, Step, Stem, Bar, Area
The Spline form is a 4 point Spline interpolated of the signal.
[Line] = 0 '*
Spline = 1
Step = 2
Stem = 3
Bar = 4
Area = 5
* In VB6 'Line' is a reserved name so it must to be delineated by [ ].
* In VBA 'Line' is a reserved name so it must be defined using a different name, example: "P2P"