[V8i C++] Updating text in Tags contained in a cell

I'm using mdlElmdscr_operation() to update the contents of a Tag. In that function I'm using mdlTag_extract() to get the current value of the tag item (in this case - text). Part of the information extracted is a TextParamWide struct. I'm attempting to add a background border around the text, without much success (so far). Will text in a Tag honor the TextParamWide.backgroundXXX and textParamWide.overridesFromStyles flags, or am I wasting my time? I'm updating those items, and using it to create a "new" Tag that is passed out of the mdlElmdscr_operation() callback.

Thanks,

Bruce