void Tree_v::AddToTreeView(element *current , int num)
{
	if (!current)
		return;
	if (current == root)
		Form4->TreeView1->Items->Add(NULL , IntToStr(current->key));
	else
		Form4->TreeView1->Items->AddChild(Form4->TreeView1->Items->Item[num] , IntToStr(current->key));
	int cur_num = Form4->TreeView1->Items->Count - 1;
	if (current->left)
		AddToTreeView(current->left , cur_num);
	if (current->right)
		AddToTreeView(current->right , cur_num);
}