MessageBox hide InputPanel

When I show a message using this code:

Code:

---

            If MessageBox.Show("Cancelar a inclusão?", "Atenção", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) = Windows.Forms.DialogResult.Yes Then
                Listar()
            End If

---

the InputPanel desapeare from my interface...

Any help?

Thanks in advance.

Loas