Hi ggummo

Try this Code in the Worksheet Module 
Option Explicit
Private Sub Worksheet_Change(ByVal Target As Range)
    Dim cNo As Long
    If Target.Cells.Count > 1 Or IsEmpty(Target) Then Exit Sub
    If Target.Address = "$R$1" Then
        Application.EnableEvents = False
        Range(Cells(2, 18), Cells(2, 18).End(xlDown)).Clear
        cNo = ActiveSheet.Rows(1).Find(Range("R1").Value, LookAt:=xlWhole).Column
        Range(Cells(2, cNo), Cells(2, cNo).End(xlDown)).Copy
        Range("R2").PasteSpecial
        Application.CutCopyMode = False
        Application.EnableEvents = True
    End If
End Sub