[This is preliminary documentation and subject to change.]
Enables the snap-in to retrieve the handle of the next item in the scope view.
HRESULT GetNextItem(
  HSCOPEITEM item,         // Handle of scope pane item
  HSCOPEITEM * pItemNext,  // Pointer to the next item address
  long * plCookie          // Pointer to the cookie's address
);
 If the handle of the next item is not obtained, NULL is returned.