[VBA]Sub AddHeader()
Dim ws As Worksheet
Set ws = Sheets("detail")
With Application.WorksheetFunction
ActiveSheet.PageSetup.RightHeader = _
.Text(.Min(ws.Columns(1)), "dd\\mm\\yy") & "-" & .Text(.Max(ws.Columns(1)), "dd\\mm\\yy")
End With
End Sub
[/VBA]