private void panel1_Click(object sender, EventArgs e)
{
this.Hide();
NhapHang frm = new NhapHang();
frm.ShowDialog();
//WHEN SHOWDIALOG() END
frm.Dispose();
this.Show();
}
private void btnNhapHang_Click(object sender, EventArgs e)
{
if (fm == null || fm.Text == "")
{
fm = new NhapHang();
fm.Show();
}
else if (CheckOpened(fm.Text))
{
fm.Show();
fm.Focus();
}
}
