After entering say 11/27/44 in my TextBox 19 I want Textbox20 to display 63,
but it is not working

Anyone see why?

Private Sub TextBox19_AfterUpdate()
UserForm1.TextBox20.Text = Application.WorksheetFunction. _
DateDif(Format(DateValue(TextBox19.Text), "mm/dd/yyyy"), Date, "y")
End Sub

TIA,