Char array or string as DLL function argument?

Question

C++ / C#

Hello. I am writing a dll to work with a device via a COM port.
Some functions take strings as arguments. The library can connect both to its own programs and to other environments, such as LabVIEW.
Tell me, how best to make them (function arguments) as a char array or as a string? and what are the pros and cons? You can refer to literature. Thanks

Answer 1

Better char*, because Firstly, this is more universal (you can connect your lib to any language that can use C-libs), and secondly, as mentioned above, the implementation of std::string differs for different compilers.

Answer 2

char* - you are passing a pointer to the data itself.
string - you are passing a pointer to a class whose implementation may differ significantly. The same code optimizer can make its own adjustments.