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In the Click Event of the Treeview, how does one know that the subnode is currently clicked and how does one obtain the subnode title?

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In the Click Event of the Treeview, how does one know that the subnode is currently clicked and how does one obtain the subnode title? Development and Application of VCL Components
Http://www.delphi2007.net/DelphiVCL/html/delphi_20061221132407217.html
In the Click Event of the Treeview, how does one know that the subnode is currently clicked and how does one obtain the subnode title?

If the value of treeview1.selected. level is greater than 0, it is the byte point. If not, it is the maximum root node.
Check whether the selected node has subnodes. Use treeview1.selected. Count to determine whether the selected node has subnodes!
Treeview1.selected. Text is the title of the selected node,

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