C / C++ / MFC

HTREEITEM hItem = GetRootItem();

while(hItem)
{
   // do some thing
   hItem = GetNextTreeItem(hItem);
}


HTREEITEM C3StateTree::GetNextItem(HTREEITEM hItem)
{
   HTREEITEM hti = NULL;

   // if there's a child, return the child
   if (ItemHasChildren(hItem))
	  hti = GetChildItem(hItem);

   if (hti == NULL)
   {
	   // no child, return sibling
	  while ((hti = GetNextSiblingItem(hItem)) == NULL)
	  {
		 // move up a level 	
	     if ((hItem = GetParentItem(hItem)) == NULL)
			return NULL;
	  }
   }
   return hti;
}