Thanks, Using GetDParameter to return the value seem to work fine.

I have a generator object that should display some derived data in the Attribute manager. The user should not be able to edit it. So far, we stored the text to display in the base container of the object and made this variable visible in the Attribute manager.
This has the disadvantage that every time the value is evaluated it increases the dirty counter of the object. Thus, we would like to display it, without storing the value in the object's base container. Is this possible?
If not, is there any other preferred way to display derived data without increasing the dirty counter?