private void pn_mailS_Click(object sender, EventArgs e) { A_Email email = new A_Email(); email.MdiParent = this; email.Show(); pn_mail.Hide(); }
private void A_email_Click(object sender, EventArgs e) { A_Email email = new A_Email(); email.MdiParent = this; email.Show(); A_email.Enabled = false; }