Convert Trailing Minus Signs Programmatically

In all versions of Excel, you can use the following macro to convert numbers with trailing minus signs.

Sub TrailingMinus()
' = = = = = = = = = = = = = = = =
' Use of CDbl suggested by Peter Surcouf
' Program by Dana DeLouis, dana2@msn.com
' modified by Tom Ogilvy
' = = = = = = = = = = = = = = = =
  Dim rng As Range
  Dim bigrng As Range

  On Error Resume Next
  Set bigrng = Cells _
     .SpecialCells(xlConstants, xlTextValues).Cells
  If bigrng Is Nothing Then Exit Sub

  For Each rng In bigrng.Cells
    If IsNumeric(rng) Then
      rng = CDbl(rng)
    End If
  Next
End Sub