[RESOLVED] Numeric Textbox with "backspace"

[Iamazn]

Im using

 Private Sub NumericKeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
        Dim allowedChars As String = "0123456789"

        If allowedChars.IndexOf(e.KeyChar) = -1 Then
            e.Handled = True
        End If

    End Sub

and it wont let me use backspace. How would I make it so I can use backspace?