How do I display scrollbars in CustomTreeCtrl

I’m using a CustomTreeCtrl. I’ve attached my project zip file. The tree displays more nodes than can be seen but there are no scrollbars. How can I make scrollbars display?

Thank you… (1.4 KB)

The scrollbar is there, you just can’t see it due to the way the SplitterWindow works. It’s not resizing its child windows it’s clipping them. If you drag the bottom right of the frame to expand it and then drag the splitter’s sash to the right it should reveal the tree control’s vertical scrollbar on the right.