append_node
orig = append_node( orig, pNode->pLeft, indent );
orig = append_node( orig, pNode->pRight, indent );
char * str = append_node(0, pNode, 0);
*msg = append_node(*msg, tree->pHead, 0);
*msg = append_node(*msg, tree->pHead, 0);
append_node(&head, dip);
append_node(&head, dip);