public frmCTHDN(frmHDN f, String mahdn)
{
InitializeComponent();
txtMaHDN.Text = mahdn;
tg = f;
}
private void nhậpHàngToolStripMenuItem_Click(object sender, EventArgs e)
{
frmHDN f = new frmHDN(manv);
adInPanel(panel, f);
}