Memory managment of set_str functions

[noreply at z505.com]

If a pointer to char is allocated in some of the functions where the 
huge number is a string, how should memory be managed and on the DLL 
side or the program side using the DLL?

i.e.
getmem()
freemem()

.. to allocate memory for the *char

The help documentation in GMP should mention a note that the *char 
should be allocated on your program side or it's allocated on the GMP 
DLL side, and when do I free it? Do I obtain the length using some 
function first for memory allocation on my program side?

Thanks,
Lars