Dim btn1 As New DataGridViewButtonColumn()
            DataGridView1.Columns.Add(btn1)
            btn1.HeaderText = "Tesserino"
            btn1.Text = "Tesserino"
            btn1.Name = "btn"
            btn1.UseColumnTextForButtonValue = True
Try
                Connection.Open()
                Dim cmd As New MySqlCommand("select * from tesserini", Connection)
                Dim dr As MySqlDataReader = cmd.ExecuteReader
                If dr.Read() Then
                    For i As Integer = 0 To DataGridView1.RowCount - 1
                        If Me.DataGridView1.Rows(Me.DataGridView1.CurrentRow.Index).Cells("ID").Value = dr("ID") Then
                            style.BackColor = Color.Green
                            btn1.DefaultCellStyle = style
                            btn1.FlatStyle = FlatStyle.Flat
                        Else
                            style.BackColor = Color.Red
                            btn1.DefaultCellStyle = style
                            btn1.FlatStyle = FlatStyle.Flat
                        End If
                    Next
                End If
            Catch ex As Exception
            End Try
            Connection.Close()