NB: More recent documentation for Dyalog APL is available at https://docs.dyalog.com/20.0/.
TreeView Methods
| Detach | ChooseFont | GetItemState |
| SetItemState | AddItems | DeleteItems |
| AddChildren | DeleteChildren | GetParentItem |
| GetItemHandle | SetItemImage | ShowItem |
| GetTextSize | Animate | GetFocus |
| ShowSIP | GetFocusObj |