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autohotkey v2 x64 How to get the string from p?
I already know After this call, str is the correct version string.

How to get the structure data from the pointer returned by the structure pointer of autohotkey v2 x64 dllcall?
For example, libcurl-x64\curl_easy_option_by_name function

[Mod edit: Added [code][/code] tags.]

NumGet() / StrGet()

@just me Thanks.
I tried other parameter combinations such as
p := DllCall("libcurl-x64\curl_version", "ptr")
s := NumGet(p, "char")
or s := NumGet(p, "int")
or s := StrGet(p, "CP0")
and got the following errors
Critical Error: Invalid memory read/write.What could be wrong?

The pointer might point to memory inside the curl dll. Try to load the dll beforehand:

@just me Thank you very much