Detecting spell check corrections

I have a textarea in my app that I enabled for spell checking. That part isn’t a problem. But how do I detect that the user has accepted a proposed corrected spelling from the offered list. Note that I’m using the built-in setting AllowSpellChecking rather than reinventing that particular wheel. The function works as expected but what, if any, event can I use to detect if the correction has been made? I tried using TextChanged event but that fires on all text changes. I just need to know if the change is a result of the spell check.

PS. Windows 10, Xojo 2019r1.1 (at present)