>>>I have a form's property that gets wrongly changed and I can't find where. How can I use Assign method do trace the unwanted change?
>>>
>>>Thanks
>>
>>You can use the debugger, and make it stop whenever this property changes value.
>Not on a user's computer. :)

No, of course not, but these kinds of things should be fixed before you send the program to your customer. Use Code Reference to find all references to this property, and check the relevant code.

If that's not practical, you may use the assign event. In the assign event, call a function which adds records to a tracking table, which you ask the customer to send to you.