private void BtnEnviar_Click(object sender, EventArgs e) { try { var arquivoIni = Helpers.OpenFile("Arquivo Ini NFe (*.ini)|*.ini|Todos os Arquivos (*.*)|*.*"); if (string.IsNullOrEmpty(arquivoIni)) { return; } var ret = AcbrNFe.NFE_LimparLista(); AcbrNFe.CheckResult(ret); ret = AcbrNFe.NFE_CarregarINI(arquivoIni); AcbrNFe.CheckResult(ret); var bufferLen = 1024; var buffer = new StringBuilder(bufferLen); ret = AcbrNFe.NFE_Enviar(1, false, false, false, buffer, ref bufferLen); AcbrNFe.CheckResult(ret); if (bufferLen > 1024) { ret = AcbrNFe.NFE_UltimoRetorno(buffer, ref bufferLen); AcbrNFe.CheckResult(ret); } rtbRespostas.AppendText(buffer.FromUTF8()); } catch (Exception exception) { MessageBox.Show(exception.Message, @"Erro", MessageBoxButtons.OK, MessageBoxIcon.Error); } }