When using C API function EssOtlGetMemberUniqueName do I need to free the returned unique name in o

If I do

ESS_STR_T    szFullName;
sts = EssOtlGetMemberUniqueName (hOutline, hMemberChild, &szFullName);

i'll get the unique name in szFullName. In the C API technincal reference manual the szFullName is not "freed" (in th examples).  That sort of suggest to me that they return a pointer into internal structures which sounds dangerous.

I just want to make sure that szFullName does not have to get freed by some EssFree function (or delete:ed) in order not to leak memory.

R.

Hans