private void txtCedula_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.Enter) { tec = tec.BuscarTecnico(txtCedula.Text); if (tec.cedula != null) { txtCedula.Text = tec.cedula; txtCedula.ReadOnly = Enabled; txtNombre.Text = tec.nombre; txtCargo.Text = tec.cargo; cbestado.Text = tec.estatus; } else { MessageBox.Show("TÉCNICO NO REGISTRADO", "Búsqueda", MessageBoxButtons.OK, MessageBoxIcon.Information); } } }