private void UPCcode_LostFocus(object sender, RoutedEventArgs e)
 {
     if (UPCcode_TextBox.Width == 0)
     {
         UPCcode_TextBox.Focus();
     }
 }
 public StartPage()
 {
     InitializeComponent();
     UPCcode_TextBox.AcceptsReturn = true;
     this.DataContext = this;
     UPCcode_TextBox.Focus();
     UPCReferenceList_ComboBox.Visibility = Visibility.Collapsed;
 }
 private void RescanUPC_click(object sender, RoutedEventArgs e)
 {
     UPCReferenceList_ComboBox.Visibility = Visibility.Collapsed;
     RescanUPC_button.Visibility          = Visibility.Collapsed;
     UPCcode_TextBox.Text       = "";
     UPCcode_TextBox.Visibility = Visibility.Visible;
     UPCcode_TextBox.IsEnabled  = true;
     UPCcode_TextBox.Focus();
     StartInfoMsg.Visibility      = Visibility.Visible;
     StartInfoMsgLabel.Visibility = Visibility.Collapsed;
     UPCcode_TextBox.Width        = 0;
 }