private void txtPort_Enter(object sender, EventArgs e)
{
SendKeys.Send("{Home}");
txtPort.SelectAll();
}
public void SelectedTextTest ()
{
MaskedTextBox mtb;
mtb = new MaskedTextBox ();
Assert.AreEqual ("", mtb.SelectedText, "#S1");
mtb.Text = "abc";
Assert.AreEqual ("", mtb.SelectedText, "#S2");
mtb.SelectAll ();
Assert.AreEqual ("abc", mtb.SelectedText, "#S3");
mtb.Dispose ();
}