source: Option Explicit
  Dim a, b, c
  a = 20
  b = 6
  c = a + b
  MsgBox "Test #26 - Sum: " & c
target: Add-Type -AssemblyName Microsoft.VisualBasic
  Option Explicit
  
  $a = 20
  $b = 6
  $c = $a + $b
  [Microsoft.VisualBasic.Interaction]::MsgBox "Test #26 - Sum: " + $c