Thank you for answer me Roland.
Not, it doesn't.
The DataWindow is in a UserObject, but the argument is locked. I reviewed the ancestors, and they are locked too. The Event ID is pbm_custom08.
If I change the Event ID to (none) value, I could change it. The point now would be to understand the implications of change the Event ID.
I am working on 32 bits. In my point of view, if it is the same as a long, must work as such, without script or event modifications. We have many applications to migrate and they have the same kind of objects.
Thank you.