En la ayuda puedes encontrar esto que preguntas.
Para el
OpenFileDialog:
Cita: [Visual Basic]
Protected Sub button1_Click(sender As Object, e As System.EventArgs)
Dim myStream As Stream
Dim openFileDialog1 As New OpenFileDialog()
openFileDialog1.InitialDirectory = "c:\"
openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*"
openFileDialog1.FilterIndex = 2
openFileDialog1.RestoreDirectory = True
If openFileDialog1.ShowDialog() = DialogResult.OK Then
myStream = openFileDialog1.OpenFile()
If Not (myStream Is Nothing) Then
' Insert code to read the stream here.
myStream.Close()
End If
End If
End Sub
http://msdn.microsoft.com/library/sp...ClassTopic.asp
Para
SaveDialog Cita: [Visual Basic]
Protected Sub button1_Click(sender As Object, e As System.EventArgs)
Dim myStream As Stream
Dim saveFileDialog1 As New SaveFileDialog()
saveFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*"
saveFileDialog1.FilterIndex = 2
saveFileDialog1.RestoreDirectory = True
If saveFileDialog1.ShowDialog() = DialogResult.OK Then
myStream = saveFileDialog1.OpenFile()
If Not (myStream Is Nothing) Then
' Code to write the stream goes here.
myStream.Close()
End If
End If
End Sub
http://msdn.microsoft.com/library/sp...ClassTopic.asp
saludos!