public FrmAddCustoms(String customsCode, int mode, UserInfo userInfo, FrmListCustoms frmListCustoms)
        {
            _userInfo = userInfo;
            _customsCode = customsCode;
            _mode = mode;
            _frmListCustoms = frmListCustoms;

            InitializeComponent();
        }
 private void mnuCustoms_Click(object sender, EventArgs e)
 {
     FrmListCustoms form = new FrmListCustoms(_userInfo);
     form.MdiParent = this;
     form.Show();
 }