For Each lva As ListViewItem In Form1.lv.Items
            If lva.SubItems(1).Text = "17" And lva.SubItems(4).Text = "22" Then
                lva.SubItems(7).Text = "Muster1"
                lva.BackColor = Color.AliceBlue
            End If
        Next
        For Each lva As ListViewItem In Form1.lv.Items
            If lva.SubItems(1).Text = "8" And lva.SubItems(4).Text = "28" Then
                lva.SubItems(7).Text = "Muster2"
                lva.BackColor = Color.Aqua
            End If
        Next