怎么动态给treeview加根节点，子节点

Question

TreeView1.Items.AddChild(nil, '字串')

Answer 1

var
  root,gNode: TTreeNode;
begin
  root:=Treeview1.Items.AddChild(nil,'aaa');
  gNode:=Treeview1.Items.AddChild(root,'bbb');
end;

Answer 2

var
  root,gNode: TTreeNode;
begin
  root:=Treeview1.Items.Add(nil,'aaa');        // 添加根节点''aaa'
  gNode:=Treeview1.Items.AddChild(root,'bbb'); // 在根节点''aaa'下添加'bbb'子节点
end; 

Answer 3

var
  boot:treenode;
begin
  boot:=treeview.items.add(nil,'根节点');
  Treeview1.Items.AddChild(boot,'子节点');
end;