private void button1_Click(object sender, EventArgs e)
{
Form cfdisplaybill = new ShowBill();
//cfdisplaybill.Parent = this.Parent;
cfdisplaybill.Show();
}
public BillProducts(string ctr)
{
ShowBill sb = new ShowBill();
billno = sb.bn;
con.ConnectionString = cn.connectionstring;
InitializeComponent();
billno = ctr;
//MessageBox.Show(billno);
}