private void btnOpen_Click(object sender, EventArgs e)
{
int orderId;
if(lbCustomers.SelectedItem == null)
return;
orderId = (lbCustomers.SelectedItem as ListItem).Value;
frmMain mainForm = new frmMain(orderId);
mainForm.Show();
}
private void btnNew_Click(object sender, EventArgs e)
{
frmMain mainForm = new frmMain();
mainForm.Show();
}