Unresolved external symbol

I have t开发者_开发百科wo WIN32 DLL projects in the solution, main.dll should call a function in mgn.dll.

mgn.dll has mgn.h header file:

#ifdef MGN_EXPORTS
#define MGN_API __declspec(dllexport)
#else
#define MGN_API __declspec(dllimport)
#endif

extern "C" bool MGN_API AttachMGN(void);

and mgn.cpp source file:

#include "stdafx.h"
#include "mgn.h"

MGN_API bool AttachMGN(void)
{
...
}

main.dll calls AttachMGN function from one of the source file:

#include "stdafx.h"
#include "..\mgn\mgn.h"

bool CreateClient()
{
    return ::AttachMGN();
}

mgn.dll compiles successfully. main.dll doesn't show any errors in VS text editor, I can navigate using "Go To Definition" function. However during build I get the error:

error LNK2019: unresolved external symbol __imp__AttachMGN referenced in function "bool __cdecl CreateClient(void)" (?CreateClient@@AW4XZ)

Both DLLs compile into the same folder. DependencyWalker shows the function AttachMGN as exported. Main project has a dependency set to Mgn project, if that matters.

I believe that I simply have overlooked something....

Thanks in advance.

You probably just forgot to add MGN.lib to your link arguments for main.dll

Is your mgn.lib linked with the main? By the sound of it, it looks as if main cannot find the lib file to link against the DLL.