
Tree view controls in Microsoft® Internet Explorer support the following new features.
- Tooltips
- Tree view controls now automatically display tooltips when an item is not entirely within the view area.
- New Item State
- Tree view controls now support a new item state for parent items, TVIS_EXPANDPARTIAL. When a parent item is set to this state, the child items are displayed and the parent's plus sign remains visible. The TVM_EXPAND message and the TreeView_Expand macro have been updated to support this feature.
- Single-Click Expansion
- The TVS_SINGLEEXPAND style causes a tree view item to be expanded when it becomes selected and to be closed when it becomes unselected.
- Adjustable Maximum Scroll Time
- The TVM_SETSCROLLTIME message allows you to set the maximum amount of time that a scroll operation can take. The TVM_GETSCROLLTIME message allows you to retrieve the maximum scroll time.
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