int Copy(TreeCtrl& dst, int did, int i, const TreeCtrl& src, int id)
{
	TreeCtrl::Node x = src.GetNode(id);
	x.ctrl = NULL;
	did = dst.Insert(did, i, x);
	dst.Open(did, src.IsOpen(id));
	for(int i = 0; i < src.GetChildCount(id); i++)
		Copy(dst, did, i, src, src.GetChild(id, i));
	return did;
}