Private Sub combobox4_TextChange(sender As Object, e As EventArgs) Handles combobox4.TextChange

    If combobox1.Text = "Added Date" And withoutButton1.Checked Then
    BooksBindingSource.Filter = String.Format("catagory LIKE '%{0}%' OR Medium Not LIKE '%{0}%'", combobox4.Text)
    End If