The IGetClusterNodeInfo::GetNodeHandle method retrieves a handle to a node.
HNODE GetNodeHandle(
  LONG lObjIndex  
);
 If GetNodeHandle is successful, it returns a handle for the node represented by lObjIndex.
If GetNodeHandle is unsuccessful, it returns NULL. For more information about the error, call the Win32 function GetLastError.
  Version: Use Windows NT Server Enterprise Edition 4.0.
  Windows CE: Unsupported.
  Header: Declared in cluadmex.h.