procedure TForm1.Button1Click(Sender: TObject);
var
iPos:integer;
Node:TTreeNode;
begin
for iPos:= 0 to TreeView1.Items.Count-1 do
begin
Node:= TreeView1.Items.Item[iPos];
if Node.Text='黑龙江'then
begin
TreeView1.Select(Node,[ssLeft]);
TreeView1.Items.AddChild(Node,'asd');
Break;
end;
end;
end;