How to get contents os dinamically created textboxes

Hello.
I'm using C# in Visual Studio and created an application in Windows forms. There's a routine that deals with balance in banks and creates text boxes for the amount in a groupbox. The number of text boxes depends on the number of bank accounts, retrieved from a database.
Another routine uses the data in the textboxes. My problem is that I don't know how to get the data in the dinamically created textboxes. My first routine is:

private void Frm_Saldo_Load(object sender, EventArgs e)
{
int i;
int Nbancos = 0;
Dtp_DataSaldo.Text = DateTime.Now.ToShortDateString();
DataTable Tab1 = Banco.LeBancos();
DataRow[] Linha = Tab1.Select(null, null, DataViewRowState.CurrentRows);
int Nitem = Tab1.Rows.Count;

// Caso haja mais que 3 bancos, deve-se ajustar o tamanho do formulário e do groupbox
if (Nitem > 3)
{
Height = 375 + (Nitem - 3) * 5;
Gb_Bancos.Height = 180 + (Nitem - 3) * 5;
}
Gb_Bancos.Tag = 0;
for (i = 0; i < Nitem; i++)
{
var Rotulo = new Label();
Rotulo.Name = "Lb_Banco" + i.ToString();
Rotulo.Text = Linha[i].ItemArray[2].ToString();
Rotulo.Location = new System.Drawing.Point(10, 40 + 30 * i);
Rotulo.Size = new Size(150, 26);
Gb_Bancos.Controls.Add(Rotulo);

var CampoSaldo = new TextBox();
CampoSaldo.Name = "Tb_Saldo" + i.ToString();
CampoSaldo.Font = FonteNormal;
CampoSaldo.Location = new System.Drawing.Point(160, 40 + 30 * i);
Gb_Bancos.Controls.Add(CampoSaldo);

var CampoCod = new TextBox();
CampoCod.Name = "Tb_Cod" + i.ToString();
CampoCod.Font = FonteNormal;
CampoCod.Location = new System.Drawing.Point(180, 40 + 30 * i);
CampoCod.Text = Linha[i].ItemArray[0].ToString();
CampoCod.Visible = false;
Gb_Bancos.Controls.Add(CampoCod);
Nbancos += 1;
Gb_Bancos.Tag = Nbancos;
}
MostraSaldo();
}

The routine MostraSaldo() is where I have the problem. Does anyone has a suggestion? Thank you.