Another VI I thought someone reading this forum thread might find helpful. This one calls the one I posted previously as a subVI.
"Make Control Glow.vi" draws a fading rectangle behind the specified control. Save it and its subVI ("Offset Glow Rect.vi") to the same subdirectory.
For example, here's a glow on a system OK button. Color and border thickness are parameterized.
Saved in LV2020.
Make Control Glow.vi
Offset Glow Rect.vi