How do I maintain data and selection in a SWF after AutoDetach() is called?

To date, the behaviour of my Flex panel has been based on the old CS4 sample, which stroked boxes using a thickness value specified in a combobox. Now I need to change the behaviour, but I'm not sure how to go about it.
At the moment the SWF file is loaded on an xxxxUIPanelSelectionObserver::AutoAttach() and unloaded on the AutoDetach(). I also have code in these functions that attaches to and from subjects in the model plug-in. xxxxUIPanelSelectionObserver is derived from ActiveSelectionObserver.
When the user collapses/minimizes the UI panel (for example into the sidebar on the RHS), AutoDetach() gets called and consequently the SWF file is unloaded and detaches observers from subjects. Consequently any data I passed to the SWF and any selections made are lost. When the user expands the UI panel, AutoAttach is called, the SWF is reloaded and observers are reattached to subjects.
This is no good for me. When I collapse the panel I need the SWF to remain loaded and for it to be updated when any changes occur to subjects in the model plug-in.
One approach would be to do a one time only SWF load/observer attach in xxxxUIPanelSelectionObserver::AutoAttach() and remove code from AutoDetach. But this doesn't sound safe to me and likely to lead to a boss/resource leak somewhere down the line.
Another would be to store all data and selection information in the C++ UI plug-in and pass that into the SWF when it gets reloaded. But this means duplication of information (especially the selection information).
The other way would be to alter when AutoAttach() and AutoDetach() get called - ideally I don't want AutoDetach to occur until the application closes. But I have no idea how that could be done.
Any ideas on how to resolve this would be appreciated.
Thanks in advance,
APMABC

I've spotted two functions - AttachToSelectionSubject() and DetachFromSelectionSubject(). They take ISubject* as an argument.
Given the desciptions, it sounds like it allows the developer to have more control over when AutoAttach and AutoDetach get called, but as there are no examples of them in use, I'm not sure how tio exploit them.

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