private void Submenu_Login_Click(object sender, EventArgs e)
{
if (lgn == null)
{
lgn = new FormLogin();
lgn.MdiParent = this;
lgn.FormClosed += new FormClosedEventHandler(lgn_FormClosed);
lgn.Show();
}
else
{
lgn.Activate();
}
}
void lgn_FormClosed(object sender, FormClosedEventArgs e)
{
lgn = null;
}