troubleshooting Question

TreeView drag&drop

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cc042297 asked on
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I need a TreeView which works like Internet Explorer's "Favorites": when dragging a node over a narrow area between two nodes, it displays a line to show that the dragged node can be dropped to the same level. When moving the mouse pointer further inside the display rectangle of a node, it becomes selected to show, that the dragged node would become the subnode of the selected one.

I checked TTreeView's source, yet I can't see how to do it. :(
Any idea?

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