=====SelectAll sur l'évènement Enter=====
Il est nécessaire de passer par un ''Invoke'' sinon la gestion du focus du curseur du TextBox est géré après le SelectAll.

<code csharp>
private void SetMaskedTextBoxSelectAll(MaskedTextBox txtbox)
{
    txtbox.SelectAll();
}

private void EnterSelectAll(object sender, EventArgs e)
{
    BeginInvoke((Action)delegate { SetMaskedTextBoxSelectAll((MaskedTextBox)sender); });
}

num.Enter += new EventHandler(EnterSelectAll);
</code>

[[http://stackoverflow.com/questions/28595370/maskedtextbox-selectall-on-gotfocus-doesnt-work-with-mouse|c# - MaskedTextBox.SelectAll on GotFocus doesn't work with mouse - Stack Overflow]] {{ :lang:csharp:ihm:form:textbox:c_-_maskedtextbox.selectall_on_gotfocus_doesn_t_work_with_mouse_-_stack_overflow_2020-04-29_8_53_24_pm_.html |Archive du 18/02/2015 le 29/04/2020}}