Sets an external boot device system name.
PRL_RESULT PrlVmCfg_SetExternalBootDevice( PRL_HANDLE hVmCfg, PRL_CONST_STR sNewSysName );
PrlApiVm.h
PRL_RESULT . Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_SUCCESS - function completed successfully.