private void BtnEntraMesario_Click(object sender, EventArgs e)
        {
            if ((txtMesario.Text == String.Empty) && (txtSenha.Text == String.Empty))
            {
                MessageBox.Show("Campo vazio, preencha.",
                                "Aviso!", MessageBoxButtons.OK, MessageBoxIcon.Information);

                txtMesario.Clear();
                txtSenha.Clear();
                txtAdm.Clear();
            }

            if ((txtMesario.Text != "") && (txtSenha.Text != ""))
            {
                clnUrna ObjClnUrna = new clnUrna();
                ObjClnUrna.Mesario      = (txtMesario.Text.Trim());
                ObjClnUrna.SenhaMesario = (txtSenha.Text.Trim());
                OracleDataReader ObjDrDados;
                ObjDrDados = ObjClnUrna.Valida_MESARIO();
                try
                {
                    if (ObjDrDados.Read())
                    {
                        //MessageBox.Show("Acesso Permitido.");
                        ObjClnUrna.Mesario = txtMesario.Text;
                        clnUrna.Temp       = txtMesario.Text;
                        Form FrmAbrir_Eleicao = new FrmAbrir_Eleicao();
                        FrmAbrir_Eleicao.ShowDialog();
                        txtMesario.Clear();
                        txtSenha.Clear();
                        txtAdm.Clear();
                    }
                    else
                    {
                        MessageBox.Show("Identificações do Mesário incorretas.",
                                        "Aviso!", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    }

                    txtSenha.Clear();
                    txtMesario.Clear();
                    txtAdm.Clear();
                    txtMesario.Focus();
                }catch (Exception error)
                { error.ToString(); }
            }
        }