My own Quantity Selector not behaving as I want

[Mindset]

HI
I have a quantitySelector in the toolbar as a button.
It works fine and I can get the value of it in my indicator.
What I can't do is change the colour to highlight that say I have gone for more than 1 contract.
Its not a deal breaker I am just mystified as to why I can't change properties?
What am I missing ?

Here is the code I am using to set the control

                quantitySelector = new NinjaTrader.Gui.Tools.QuantityUpDown();
                quantitySelector.VerticalAlignment = VerticalAlignment.Center;
                quantitySelector.Padding = new System.Windows.Thickness(3,0,3,1);
                quantitySelector.Margin = new System.Windows.Thickness(0);
                quantitySelector.BorderThickness = new Thickness(2,2,2,2);

                chartWindow.MainMenu.Add(quantitySelector);
                 quantitySelector.Value = 1;/// sets minimum so value is not zero
                quantitySelector.Background = Brushes.Blue;//works but can't get background to change in value_changed event
​

and here is my Value_Changed Event

                private void QuantitySelector_ValueChanged(object sender, RoutedEventArgs e)
        {
            ChartControl.Dispatcher.InvokeAsync((Action)(() =>
{
            myQuantity        = quantitySelector.Value;
            ForceRefresh();
            if(myQuantity > 1)
            // NinjaTrader.Gui.Tools.QuantitySelector.BackgroundProperty. = Brushes.Red;
            quantitySelector.BorderThickness = new Thickness(3,3,3,3);
            quantitySelector.BorderBrush= Brushes.Red;

            //quantitySelector.Background = Brushes.Red;
            }));
        }​

[NinjaTrader_Jesse]

Hello Mindset,

Most of the WPF controls colors are dictated by the skin files which would overwrite your manual changes. This is also a custom control so setting the values directly on the control instead of the sub controls it uses would mean that no change is made. You can try setting the Style property to null and see if that allows for your color changes, if not that means the properties you are setting are not being used by the sub controls it contains.