Detours Simple sample applications dll export problem

[keret]

I'm new to C++. I try to build the Simple application in Microsoft's detours project in VS08. Detours is used to inject dlls into API processes or into applications. You can find it at: http://research.microsoft.com/en-us/projects/detours/ I managed to build: detoured.dll detours.lib Simple.dll (That's the hook) setdll.exe (The program that injects the hook) sleep5.exe (The exe that uses the hooked API) When I try to run the hook: setdll /d:simple.dll I get the error message: Error: simple.dll does not export function with ordinal #1. It's because Simple.dll doesn't export anything. Detoured.dll does export the function detoured. detoured.h:

//////////////////////////////////////////////////////////////////////////////
//
// Presence of this DLL (detoured.dll) marks a process as detoured.
//
// Microsoft Research Detours Package, Version 2.1.
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//

#ifdef DETOURED_EXPORTS
#define DETOURED_API __declspec(dllexport)
#else
#define DETOURED_API __declspec(dllimport)
#endif

HMODULE DETOURED_API WINAPI Detoured();

//
///////////////////////////////////////////////////////////////// End of File.

detoured.cpp:

//////////////////////////////////////////////////////////////////////////////
//
// Presence of this DLL (detoured.dll) marks a process as detoured.
//
// Microsoft Research Detours Package, Version 2.1.
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//

#include #include "detoured.h"

static HMODULE s_hDll;

HMODULE WINAPI Detoured()
{
return s_hDll;
}

BOOL WINAPI DllMain(HINSTANCE hinst, DWORD dwReason, LPVOID reserved)
{
(void)reserved;

if (dwReason == DLL\_PROCESS\_ATTACH) {
    s\_hDll = hinst;
    DisableThreadLibraryCalls(hinst);
}
return TRUE;

}

//
///////////////////////////////////////////////////////////////// End of File.

But simple.cpp is just this in the package:

//////////////////////////////////////////////////////////////////////////////
//
// Detours Test Program (simple.cpp of simple.dll)
//
// Microsoft Research Detours Package, Version 2.1.
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// This DLL will detour the Windows Sleep API so that TimedSleep function
// gets called instead. TimedSleep records the before and after times, and
// calls the real Sleep API through the TrueSleep function pointer.

[_Superman_]

Put the line

#define SIMPLE_EXPORTS

before the line

#include "simple.h"

«_Superman_»

[keret]

Thanks, that worked. But I still don't know, why detoured.dll exported without "#define DETOURED_EXPORTS".

[_Superman_]

The pre-processor definitions can also be given as a project settings instead of putting it inside the code file. Check the PreprocessorDefinitions key inside .vcproj file. It could be there.

«_Superman_»

[keret]

Bingo! I copied it from an other project and I forgot about it. Man, it's so complicated!