private void bt_confirmar_Click(object sender, EventArgs e) { DataSetOrigensTableAdapters.USUARIOSTableAdapter adaptador = new DataSetOrigensTableAdapters.USUARIOSTableAdapter(); if ((int)adaptador.autenticar(txtLOGIN.Text, txtSENHA.Text) > 0) { frm_principal principal = new frm_principal(); principal.Show(); this.Close(); this.Dispose(); } }