Returns backup file info handles list.
PRL_RESULT PrlBackup_GetFilesList( PRL_HANDLE hBackup, PRL_HANDLE_PTR phList );
PrlApiBackup.h
PRL_RESULT. Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_OUT_OF_MEMORY - out of memory to create backup object.
PRL_ERR_SUCCESS - function completed successfully.