How to export unmanaged dll (for custom types)?

Question

hello,

 

   My code is this:

#include<iostream>

typedef struct CalTest{

int x;

int y;

}OurType;

extern "C"{

_declspec(dllexport) OurType MyFun(int a,int b){

OurType ot;

/*

Do some processing.

*/

ot.x=a; // Assumed to be a

ot.y=b; // Assumed to be b

return ts;

}

}

 

In addition, What types can accept its(OurType)in c#? 

 

Thanks.