private void orderingmenuBttn_Click(object sender, EventArgs e)
{
if (orderingmenuform == null)
{
orderingmenuform = new orderingmenuFrm();
orderingmenuform.FormClosed += orderingmenuform_FormClosed;
}
orderingmenuform.Show(this);
Hide();
}
void orderingmenuform_FormClosed(object sender, FormClosedEventArgs e)
{
orderingmenuform = null;
Show();
}
