Force windows to refresh a disk FAT

volumeHandle = CreateFile(volumePath,
                          GENERIC_READ|GENERIC_WRITE,
                          FILE_SHARE_READ|FILE_SHARE_WRITE,
                          NULL,
                          OPEN_EXISTING,
                          FILE_ATTRIBUTE_NORMAL,
                          0 );
FlushFileBuffers( volumeHandle );
DeviceIoControl( volumeHandle, FSCTL_LOCK_VOLUME, NULL, 0, NULL, 0, &cbReturned, NULL ) ;
DeviceIoControl( volumeHandle, FSCTL_DISMOUNT_VOLUME, NULL, 0, NULL, 0, &cbReturned, NULL );
//Keep the handle open here.
//System hibernates.

DeviceIoControl( volumeHandle, FSCTL_UNLOCK_VOLUME, NULL, 0, NULL, 0, &cbReturned, NULL )
CloseHandle(volumeHandle)