private void btnThemDonViTinh2_Click(object sender, EventArgs e)
{
FrmDanhSachDVT frm = new FrmDanhSachDVT();
frm.ShowDialog();
}
private void btnThemNhaCungCap_Click(object sender, EventArgs e)
{
FrmDanhSachDVT frm = new FrmDanhSachDVT();
frm.ShowDialog();
}