Not getting the Value from my UserControl

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VB8

VB

i created a user control to accept only Numerical Digits.
I used this control on my form to calculate total of 2 numbers
i entered some values in both controls. only values are showing in user controls (ex 10, 20)
but iam not getting the total. and i put BreakPoint in LostFocus event.
but it is not comming to that particular event. why & what to do.

i had written the following code in my usercontrol

Public Class Number2
    Public Event TxtN_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)
    Private Sub txtN_KeyPress1(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles txtN.KeyPress
        If e.KeyChar <> "." And (e.KeyChar < "0" Or e.KeyChar > "9") Then
            e.Handled = True
        End If
    End Sub
    Private Sub txtN_LostFocus1(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtN.LostFocus
        txtN.Text = FormatNumber(Val(txtN.Text), 2, , , False)
    End Sub
    Private Sub txtN_TextChanged_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtN.TextChanged
        RaiseEvent TxtN_TextChanged(sender, e)
    End Sub
    Property txtNtext() As String
        Get
            txtNtext = txtN.Text
        End Get
        Set(ByVal value As String)
            txtN.Text = value
        End Set
    End Property

End Class
and in form i am using it as
    Private Sub txtN1_LostFocus(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtN1.LostFocus
        txtN3.Text = FormatNumber(Val(txtN1.Text) + Val(txtN2.Text), 3, , , TriState.False)
    End Sub

but nothing is calculating in its lostfocus