source: Option Explicit
  Dim val64
  val64 = 8 * 8
  MsgBox "Test #64 - 8*8= " & val64
target: Add-Type -AssemblyName Microsoft.VisualBasic
  Option Explicit
  
  $val64 = 8 * 8
  [Microsoft.VisualBasic.Interaction]::MsgBox "Test #64 - 8*8= " + $val64