The SPFILENOTIFY_NEEDMEDIA notification is sent to the callback routine when new media or a new cabinet file is required.
SPFILENOTIFY_NEEDMEDIA
    Param1 = (UINT) SourceMediaInfo;
    Param2 = (UINT) NewPathInfo;
 The callback routine should return one of the following.
| Value | Meaning | 
|---|---|
| FILEOP_NEWPATH | The media is present and the requested file is available at the win32 path specified in the buffer pointed to by Param2. | 
| FILEOP_SKIP | Skip the requested file | 
| FILEOP_ABORT | Abort queue processing. The SetupCommitFileQueue function returns FALSE. GetLastError returns extended error information, such as ERROR_CANCELLED if the user canceled. | 
| FILEOP-DOIT | The media is available. | 
  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, SOURCE_MEDIA