Get last item in branch


In my programming, I have often had to derive the last item in a branch. In fact some of the other topics I cover, uses this function to get the last item in the branch.
 
// GetLastItem  - Gets last item in the branch
// Returns      - Last item
// hItem        - Node identifying the branch. NULL will 
//                return the last item in outine
HTREEITEM CTreeCtrlX::GetLastItem( HTREEITEM hItem )
{
        // Last child of the last child of the last child ...
        HTREEITEM htiNext;

        if( hItem == NULL ){
                // Get the last item at the top level
                htiNext = GetRootItem();
                while( htiNext ){
                        hItem = htiNext;
                        htiNext = GetNextSiblingItem( htiNext );
                }
        }

        while( ItemHasChildren( hItem ) ){
                htiNext = GetChildItem( hItem );
                while( htiNext ){
                        hItem = htiNext;
                        htiNext = GetNextSiblingItem( htiNext );
                }
        }

        return hItem;
}