主题：身份证号控件的keydown事件里面允许输入ctrl+V

If e.KeyCode =Asc("X") OrElse e.KeyCode =Asc("x") OrElse e.KeyCode >= Asc("0") AndAlso e.keycode <= Asc("9") OrElse e.keycode >= 96 AndAlso e.keycode <= 106  Then
    If e.sender.text.length > 17 Then
        e.cancel = True
    End If   
ElseIf e.KeyCode <> Keys.back Then
    e.cancel = True   
End If

If e.Control AndAlso e.KeyCode = keys.v Then
    e.cancel = False
End If