equivalent char* in C#

Question

I have a dll that is written in c++. And I am p/invoking to call the functions.

I have this c++ declaration.

int dll_registerAccount(char* username,          


        

Answer 1

Be aware of calling conventions, this tripped me up. In my case I need to call a C++ DLL but with C-style exports, which uses the cdecl calling convention. If you have the luxury of having the source Visual Studio Solution, go to Properties -> C/C++ -> Advanced and find it under "Calling Convention". This fix it for me:

[DllImport(DllName, CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
// bool MyFunction(char* fileName) <-- From the DLL
static extern bool MyFunction(string fileName);