private void MenuSetStartAdd_Click(object sender, RoutedEventArgs e) { SetStartAdd mySetStartAdd = new SetStartAdd(); bool? b = mySetStartAdd.ShowDialog(); if (b == true) { PCStartValue = (ushort)Int32.Parse(mySetStartAdd.newPC.Text, NumberStyles.HexNumber); tbPC.Text = PCStartValue.ToString("X4"); } }