We provide such properties in our Green theme and they make customizing the read only states of all controls easier. Currently the read only state looks like disabled and there is no easy way to change it.
With the current implementation is not possible.
We have a business case, where we build a spreadsheet with collapsable groups and subgroups. Our customers wanted to have an overview about the group totals on each group and expand and collapse the groups on demand (because it's also possible in Excel).
So, it would be awesome, if you could extend your spreadsheet component with that feature as well.
They are used by the page and the XObjects drawn on it and deal with the overlaying of the colors. These groups are described on page 556 of PdfReference 1.7.
I think that deploying scenario for applications and protecting dll-s are complicated. I think that better way is to use control panel. I want to send you needed informations through control panel, a and I want to provide me my version of dll-s that are protected and I can use it in my app. You build it on your own. The way you are doing it now is complicated, and can produce issues.