private void orderqueueBttn_Click(object sender, EventArgs e) { if (orderqueueform == null) { orderqueueform = new orderqueueFrm(); orderqueueform.FormClosed += orderqueueform_FormClosed; } orderqueueform.Show(this); Hide(); }
void orderqueueform_FormClosed(object sender, FormClosedEventArgs e) { orderqueueform = null; Show(); }