The SPFILENOTIFY_ENDQUEUE notification is sent to the callback routine when all of the queued operations have been completed.
SPFILENOTIFY_ENDQUEUE
    Param1 = (UINT) Result;
    Param2 = (UINT) 0;
 The return value is ignored.
  Windows NT:  Use version 4.0 and later.
  Windows:  Use Windows 95 and later.
  Windows CE:  Unsupported.
  Header: Declared in setupapi.h.
Overview, Notifications, SetupCommitFileQueue, SetupDefaultQueueCallback