Save CTree to file? please help

[Matt Hillebrand <hill9361 uidaho edu>]

What's a good way to save everything in a CTree to a file so that the
tree can be easily rebuilt using this file?

It's easy to get the data in each column, but I can't think of a good way
to represent the nodes' structure (parents, children, siblings...) in a
file.

Thanks,

Matthew P. Hillebrand