Change fillet radius

I am trying to change the fillet radius and am not sure if Iam headed in the correct direction. I am trying to use:

VariableFilletFeatureData.SetRadius(ByVal Object, ByVal Double)

but I can't seem to get it to work. Also, I am looking for a betterway to figure out SW commands, because my current strategy issifting through the object browser since almost everything i wantto do does not get recorded by the record macro feature. However,this is a long and tedious process and hard for what programmingskills I have.

Edit:

So I am pretty sure VariableFilletFeatureData is not what I want touse, but I am not sure if I should be using SimpleFilletFeature orsomething else. I am working with a fillet between two faces, notan edge fillet.SolidworksApi macros