private void listarToolStripMenuItem1_Click(object sender, EventArgs e)
        {
            if (_frmValorListar == null)
            {
                _frmValorListar = new FrmValorListar(this);
            }

            _frmValorListar.Show();
            this.Hide();
        }
 public frmValorEditar(int valorId, FrmValorListar main)
     : this(valorId)
 {
     _frmValorListar = main;
 }