Hi Larson HT,
I dont know if this will help you, but its what a figure out to measure a element length.
Sub Main
Dim App As femap.model
Set App = feFemap()
'--Create a solid
App.feSolidPrimitive(0,1,True, Array(0,0,0), Array(20, 5, 5), TEST_1)
'--Create a material
[...