Hi Darrin
Sorry - I now see what you're saying: the frame has a fill component, which is not transparent by default, and that can't be changed programmatically. This fill component then remains visible behind the Text Background on controls that have a solid-filled frame, which are all the controls with any type of text box except the some Classic and all Modern controls, resulting in setting the Text background to Transparent just exposing the solid frame fill color.
Looks like if I want to go to NXG, I'll need to customize them as you describe, and - thank you - it does help (though not as much as I would have hoped on the NXG single-pixel frame controls) to open the controls customizer and the Parts Window to check on what component is selected for color changing. Silver works too if you also unstack the elements so that you can delete the "Custom Cosmetics" elements (or possibly make them transparent too, though I didn't test that) and re-stack everything, and then set a Rounded Box (Silver) decoration behind this one but also behind whatever control you're using to color the background, so that it still looks like a Silver control. I've attached an example of this, with instructions.
So, ultimately, it's the Modern controls that are apparently "special" in that they have a frame that has a transparent fill and nothing else between the frame and the text/value box in the control, making them easy to place a color box or Boolean behind to act to color them. The NXG and Silver controls require a bit more work, with the Silver being easier to select the Frame but having elements that need to be deleted.
Not exactly a "bug" but rather a feature not well explained (and not exposed programmatically).
Thanks!
Erik
