Retrieves all backupable virtual machines from server.
PRL_HANDLE PrlSrv_GetBackupVmList( PRL_HANDLE hServer, PRL_UINT32 nFlags );
PrlApiBackup.h
A handle of type PHT_JOB containing the results of this asynchronous operation or PRL_INVALID_HANDLE if there's not enough memory to instantiate the job object. Job result contains list of PHT_BACKUP handles.