How to pass a parameter of an instance as a variable?

Hi everyone, this is my first post... I would really appreciate any help.

Sorry if the question is trivial, I am just starting learning API and after many hours on google I could not find a clear answer to this...

I am wiritng a macro to automatize a series of commands in solidworks, I am now stuck with 2 similar issues:

I want to scale all the selected elements of a sketch by a scale factor and later I want to extrude a closed contour into a solid by a certain depth. I want the scale factor and the depth to be variable imported from an external file or prompted by the user... I am failing this miserably.

My code works if I hardcode the values:

Part.Extension.ScaleOrCopy(False, 0, 0, 0, 0, 0.75)

...

Part.FeatureManager.FeatureExtrusion2(False, False, False, 0, 0, 1.2, 1.2, False, False, False, False, 0, 0, False, False, False, False, True, True, True, 0, 0, False)

but it does not when I declare and pass the parameters as variables:

Dim ScaleFactor As Long

ScaleFactor = 0.75

Part.Extension.ScaleOrCopy(False, 0, 0, 0, 0, ScaleFactor)

...

Dim Depth As Long

Depth = 1.2

Part.FeatureManager.FeatureExtrusion2(False, False, False, 0, 0, Depth, Depth, False, False, False, False, 0, 0, False, False, False, False, True, True, True, 0, 0, False)

what am I not getting?

Thanks!