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#11
I tried to do this few months ago, but didn't get a good enough result. The problem is that the progress box doesn't use the standard function TaskDialogIndirect. If it did, it would be simply a matter of flipping one bit.
The closest I got was to simulate a click on the "More" button when the box shows up. This however causes a nasty flicker if it is done too soon. If I delay the "click" by 1 second it works fine. But by then most copy operations are done. There are also some other technical problems, but I believe they are solvable. I decided to not pursue this further since it is just a partial solution at best.
Is anybody interested in this partial solution? Basically you'll get your progress box, and a second later it will expand to view the details as if you clicked on the "More" button yourself.