Hello,

Let me describe my task:
The GUI displays a tree (like Windows Explorer) with items (we plan to use
Windows TreeView control). Classic operations are available (add new item,
edit item name, delete).
It is expected that this tree to have a large number of items (thousands).
The application builds the tree by reading the treee structure from a single
file on disk.

One obvious approach will be XML but it requires too much memory (the tree needs to be updated so lite libraries like SAX can't be used).

I have an idea how to create my own format and serialize the tree structure
efficiently on a file (the file is only appended, even when deleting tree
items)
But before starting this, I thought it would be good to ask community about
any already existing library\API which successfully handle this task.
An example for this will be OLE Structured storage but I haven't used it.

Thank you.