private void btn_Them_Click(object sender, EventArgs e)
{
FrmThemNguoiDung frm = new FrmThemNguoiDung(this);
Form f = (Form)frm;
f.Show();
f.Focus();
}
private void button2_Click(object sender, EventArgs e)
{
DataGridViewRow row = dgvNguoiDung.CurrentCell.OwningRow;
string maND = row.Cells["MaND"].Value.ToString();
FrmThemNguoiDung frm = new FrmThemNguoiDung(this, long.Parse(maND));
Form f = (Form)frm;
f.Show();
f.Focus();
}
