C++ Wrapper for TFS API - c++

Question

I have 2 projects in VS 2012 trying to build a C++ wrapper for the Team Foundation Server API.
#pragma once
using namespace System;
using namespace System::Reflection;
using namespace System::Collections::ObjectModel;
using namespace Microsoft::TeamFoundation::Client;
using namespace Microsoft::TeamFoundation::Framework::Common;
using namespace Microsoft::TeamFoundation::Framework::Client;
namespace ManagedDll {
public ref class TFSAUth
{
public:
TFSAUth();
~ TFSAUth();
void AuthUser()
{
System::String ^x = gcnew String( "http://myhost:8080/tfs");
System::String ^u = gcnew String( "user");
System::String ^p = gcnew String( "Pass");
System::Net::NetworkCredential ^c = gcnew System::Net::NetworkCredential(u, p);
TeamFoundationServer ^something = gcnew TeamFoundationServer(x, c);
something->Authenticate();
System::String ^col = gcnew String (something->TfsTeamProjectCollection->Name);
Console::WriteLine(col);
}
private:
};
TFSAUth:: TFSAUth()
{
}
TFSAUth::~ TFSAUth()
{
}
}
__declspec(dllexport) void Auth()
{
ManagedDll::TFSAUth work;
work.AuthUser();
}
This is the library project and I have a Test Application using this library.
#include "stdafx.h"
#include "conio.h"
#include <iostream>
#include <windows.h>
#include "ManagedDll.h"
_declspec(dllexport) void Auth();
int _tmain()
{
Auth();
system("pause");
return 0;
}
Was all working for a while, opened this project to see if I can get any further. Today it fails to compile, giving me linker errors.
TestApp.obj : error LNK2019: unresolved external symbol "void __cdecl
Auth(void)" (?Auth##YAXXZ) referenced in function _wmain
I am not sure why as nothing has changed. But more than that, I am wondering whether I am doing the right thing while creating the C++ wrapper for TFS API.
Any help/examples/suggestions is much appreciated as this is my first attempt at a wrapper.

Answer 1

In your native C++ project (Test Application), you have to include the lib file of the managed C++ project (ManagedDll).
The exported DLL function in the manage C++ DLL is treated as the same as that in the native C++ DLLs, you can follow this: Lib Files as Linker Input to make it work.
Also, you should remove
_declspec(dllexport) void Auth();
in the Test Application.