Put the data here. If you don't need the string anymore,
call FreeVec() to free it.
stream
Read from this stream
RESULT
The function returns TRUE on success. On success, the string
read is written into dataptr. On failure, FALSE is returned and the
contents of dataptr are not changed. The string must be freed with
FreeVec().
NOTES
This function reads big endian values from a streamhook even on
little endian machines.