Public Class Form1
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim oXML As New XmlDocument
op1.ShowDialog()
oXML.Load(op1.FileName)
Dim noPai As String = oXML.SelectSingleNode("nfeProc").ChildNodes(0).InnerText
lstDados.Items.Add(noPai)
End Sub
End Class
Gostaria de saber o que há de errado neste código, que esta dando NullException?