Hi,

When you use the OnPropertyChanged event on a selection item, the item property is of type SelectionItem. Unfortunately, this object type does not have a Parent property like other items. Therefore, it is not possible to access the checkbox group inside the selection item.

So I would suggest using the OnPropertyChanged event on the process value. In the case of a checkbox group, only one bit of the process value can change. So using a bitwise XOR it is possible to get the ID of the changed item.

I have created a small script that changes the text of a text box (named "tb") that displays the ID and text of the changed checkbox.

Put the following inside your OnPropertyChanged event of the process value:

let old = null;

Kind regards
Stefan