I'm trying to find a way to build a handler to validate the new value by capturing user input through a dialog. I guess it's not what onValueChanging expecting, as the handler wants options.value = options.oldValue insight its body, if I need to reject the change.
If I try to save options for later reassignment, it doesn't work. I wonder if anybody tried to do something similar, to make the handler asynchronous-like.
Thanks in advance
