Functions that mIRC execute in DLLs have a specific list of arguments, the `char* data` argument can be filled with data to be returned from the $dll() call in mIRC, how many bytes can it hold?

Also, would it be safe for me to free() the memory `data` points to and point it to some memory I've allocated myself?

For the last year, mIRC now holds roughly(!) 4000 bytes of data in strings/variables/results-- this limit is not universal across mIRC, though I believe this is now the limit for DLLs. If not, ~900 should work.


No, it would be extremely unsafe for you to do that.

The char *data is pre-allocated and managed by mIRC. It is used after the dll call to read results, specifically:



If you free()'d data, mIRC would crash, either by attempting to read invalid memory or by free'ing already-deallocated memory.

I can confirm that at least 3800 bytes of data can be used with dlls.
More than that, may be an issue for some cases.