private void toolStripStatus_Sua_Click(object sender, EventArgs e)
        {
            frmXuLy_HoaDonTraLaiNhaCungCap tra = new frmXuLy_HoaDonTraLaiNhaCungCap("Update");

            tra.ShowDialog();
        }
 private void toolStripStatus_ThemMoi_Click(object sender, EventArgs e)
 {
     frmXuLy_HoaDonTraLaiNhaCungCap tra = new frmXuLy_HoaDonTraLaiNhaCungCap("Insert");
     tra.ShowDialog();
 }
        private void toolStripStatus_ThemMoi_Click(object sender, EventArgs e)
        {
            frmXuLy_HoaDonTraLaiNhaCungCap tra = new frmXuLy_HoaDonTraLaiNhaCungCap("Insert");

            tra.ShowDialog();
        }
 private void toolStripStatus_Sua_Click(object sender, EventArgs e)
 {
     frmXuLy_HoaDonTraLaiNhaCungCap tra = new frmXuLy_HoaDonTraLaiNhaCungCap("Update");
     tra.ShowDialog();
 }