错误LNK2001:未解析的外部符号LIBID_

时间:2014-08-05 06:54:54

标签: visual-studio-2012 com mfc atl

我正在创建一个ATL Com DLL。

在链接时,我收到以下错误

dllmain.obj:错误LNK2001:未解析的外部符号LIBID_ATLProject4Lib

以下是涉及的文件

的stdafx.h

#include "targetver.h"

#define _ATL_APARTMENT_THREADED

#define _ATL_NO_AUTOMATIC_NAMESPACE

#define _ATL_CSTRING_EXPLICIT_CONSTRUCTORS  // some CString constructors will be explicit


#define ATL_NO_ASSERT_ON_DESTROY_NONEXISTENT_WINDOW

#include "resource.h"

#include <atlbase.h>
#include <atlctl.h>
#include <atlcom.h>

ATLProject4.cpp

#include "stdafx.h"
#include "resource.h"
#include "ATLProject4_i.h"
#include "dllmain.h"


using namespace ATL;

class CAppModule : 
    public CComModule
{
};

// Used to determine whether the DLL can be unloaded by OLE.
STDAPI DllCanUnloadNow(void)
{
            return _AtlModule.DllCanUnloadNow();
    }

// Returns a class factory to create an object of the requested type.
STDAPI DllGetClassObject(_In_ REFCLSID rclsid, _In_ REFIID riid, _Outptr_ LPVOID* ppv)
{
        return _AtlModule.DllGetClassObject(rclsid, riid, ppv);
}

// DllRegisterServer - Adds entries to the system registry.
STDAPI DllRegisterServer(void)
{
    // registers object, typelib and all interfaces in typelib
    HRESULT hr = _AtlModule.DllRegisterServer();
        return hr;
}

// DllUnregisterServer - Removes entries from the system registry.
STDAPI DllUnregisterServer(void)
{
    HRESULT hr = _AtlModule.DllUnregisterServer();
        return hr;
}

// DllInstall - Adds/Removes entries to the system registry per user per machine.
STDAPI DllInstall(BOOL bInstall, _In_opt_  LPCWSTR pszCmdLine)
{
    HRESULT hr = E_FAIL;
    static const wchar_t szUserSwitch[] = L"user";

    if (pszCmdLine != NULL)
    {
        if (_wcsnicmp(pszCmdLine, szUserSwitch, _countof(szUserSwitch)) == 0)
        {
            ATL::AtlSetPerUserRegistration(true);
        }
    }

    if (bInstall)
    {   
        hr = DllRegisterServer();
        if (FAILED(hr))
        {
            DllUnregisterServer();
        }
    }
    else
    {
        hr = DllUnregisterServer();
    }

    return hr;
}

dllmain.cpp

// dllmain.cpp : Implementation of DllMain.

   #include "stdafx.h"
#include "resource.h"
#include "ATLProject4_i.h"
#include "dllmain.h"

CATLProject4Module _AtlModule;

// DLL Entry Point
extern "C" BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
{
    hInstance;
    return _AtlModule.DllMain(dwReason, lpReserved); 
}

1 个答案:

答案 0 :(得分:1)

在一个源文件中,写下#define INITGUID然后#include "ATLProject4_i.h"

如果我没记错的话,向导会生成一个名为initguid.cpp的文件,其中只包含这两行,并将其添加到项目中。你好像想念你的。

这是它的工作原理。 MIDL生成的头文件(通常为IDLFileName_i.h)包含一堆DEFINE_GUID个调用。 DEFINE_GUID是一个宏,在未定义extern时扩展为全局变量声明(使用INITGUID),在extern时扩展为定义(不包含INITGUID) }已定义。