I remembered this morning a new object was introduced in Max6 to display the progress of a process. But as I'm really stupid, I forgot its name, and even forgot that the "progress" word was related to what I was looking for. I took me more than an hour to find this object...
But when I see how its help file looks like, and its reference, and the fact that it doesn't appear in Max' Explorer, nor in the "List by A-Z", I'm afraid c74 also forgot about this object.
BTW, why is slide categorized into the U/I section in the Explorer?