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procedure TForm1.Button1Click(Sender: TObject);



var

MyTreeNode1, MyTreeNode2: TTreeNode;

begin

with TreeView1.Items do

begin

Clear; { remove any existing nodes }

MyTreeNode1 := Add(nil, 'RootTreeNode1'); { Add a root node }

{ Add a child node to the node just added }

AddChild(MyTreeNode1,'ChildNode1');



{Add another root node}

MyTreeNode2 := Add(MyTreeNode1, 'RootTreeNode2');

{Give MyTreeNode2 to a child }

AddChild(MyTreeNode2,'ChildNode2');



{Change MyTreeNode2 to ChildNode2 }

{ and add a child node to it}

MyTreeNode2 := TreeView1.Items[3];

AddChild(MyTreeNode2,'ChildNode2a');



{Add another child to ChildNode2, after ChildNode2a }

Add(MyTreeNode2,'ChildNode2b');



{add another root node}

Add(MyTreeNode1, 'RootTreeNode3');

end;

end;

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