Public Class Form1
 
    Private Sub Button8_Click(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles Button8.Click
 
    End Sub
 
    Private Sub Button1_Click(ByVal sender As Object, ByVal e As _
      System.EventArgs) Handles Button1.Click
 
        If Label1.Text = "" Then
 
            Label1.Text = "Problem erfolgreich gelöst"
 
            Button1.Text = "löschen"
            Button1.BackColor = Color.OrangeRed
 
        Else
            Button1.Text = "löschen"
            Label1.Text = ""
            Button1.Text = "Ausgabe"
            Button1.BackColor = Color.LightGreen
            Button2.BackColor = Color.Pink
 
 
 
            End If
 
    End Sub
End Class