Length of Extrude

Hello,

i'm trying to determine the length of an extrude.

i arrived to select it.

dim boolstatus as boolean

dim swFeat as as Feature

boolstatus = Part.Extension.SelectByID2("Boss-Extrude1@part@assembly", "BODYFEATURE", 0, 0, 0, True, 0, Nothing, 0) 

        swFeat = swSelMgr.GetSelectedObject6(1, -1)

GetLength ?

i'm waiting for your help, and thanks.

SolidworksApi/macros