TVS_HASBUTTONS
Displays plus (+) and minus (-) buttons next to parent items. The user clicks the buttons to expand or collapse a parent item's list of child items. To include buttons with items at the root of the tree view, TVS_LINESATROOT must also be specified.
I'm pretty sure that the sign is only shown when an item has children. Are you doing stranges things with I_CHILDRENCALLBACK? Try making a demo project, with a dialog, and just add a few boring items to it, and see if it behaves properly. If so, start looking at the differences. How are you populating the tree? Are you calling some function you haven't written, or are you using FindFirstFile/FindNextFile to get the file names to populate the tree with? Iain.
Iain Clarke appears because CPallini still cares.