Returns backup session uuid.
PRL_RESULT PrlBackup_GetSessionUuid( PRL_HANDLE hBackup, PRL_STR strUuid, PRL_UINT32_PTR pnBufLength );
PrlApiBackup.h
PRL_RESULT. Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_BUFFER_OVERRUN - the size of the output buffer is not large enough. The parameter that is used to specify the size will contain the required size.
PRL_ERR_SUCCESS - function completed successfully.
Returns an empty string if session has not been started yet.