Private Sub btnAssinar_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAssinar.Click openFileDialog1.InitialDirectory = (Application.StartupPath & "\nfe\arquivos") openFileDialog1.Filter = "NF-e (*.xml)|" openFileDialog1.Title = "Assinar NF-e" If (openFileDialog1.ShowDialog = DialogResult.OK) Then lblStatus.Text = "Assinando arquivo, aguarde..." lblStatus.Refresh() lblStatus.Text = New nfecsharp().AssinarArquivoXML(openFileDialog1.FileName, "infNFe") End If End Sub