void Traverse(HTREEITEM hTree)

 {

     if (!hTree)

     {

         return;

     }

     //Do Something.

     //Traverse Child Node

     HTREEITEM hChild = GetChildItem(hTree);

     Traverse(hChild);

     //Traverse Sibling Node

     HTREEITEM hSibling = GetNextSiblingItem(hTree);

     Traverse(hSibling);

 }