private void button_GetGPI1_Click(object sender, EventArgs e) { bool ret = false; if (HighLevelInterface.GetGPI1Status(tbIpAddress.Text, ref ret) == Result.OK) { if (ret) { lbGPI1.Text = "ON"; } else { lbGPI1.Text = "OFF"; } } else { lbGPI1.Text = "UNKNOWN"; } }