进入 Project-->Setting--> C/C++ Page,做以下修改: 1. 在Preprocessor definitions中加入_AFXDLL,加入后的设置大概是这样的: WIN32,_DEBUG / NODEBUG,[_CONSOLE],[_MBCS],_AFXDLL 加入的_AFXDLL是关键 ,它欺骗MFC LIB,避免连接 MFC 的 WinMain 函数。 2. 修改Project Options,将 /MT或者 /ML标志改为 /MD。 原因是在 afxver_.h 中会检查_AFXDL, _MT, _DLL 标志是否同时设置,否则报错。尽管链接 For Multi-Threaded 版本的 Library 会损失一些性能,但是这个标志的存在并不导致编译器把 Project 编译成 DLL。 3. 在Project的 stdafx.h 中包含必要的头文件,或者直接从MFC AppWizard创建的stdafx.h中拷贝: #define VC_EXTRALEAN // Exclude rarely-used stuff from Windows headers
#include <afx.h> #include <afxwin.h> // MFC core and standard components #include <afxext.h> // MFC extensions #include <afxdtctl.h> // MFC support for Internet Explorer 4 Common Controls #ifndef _AFX_NO_AFXCMN_SUPPORT #include <afxcmn.h> // MFC support for Windows Common Controls #endif // _AFX_NO_AFXCMN_SUPPORT 4. 在Project的WinMain / main中加入MFC的初始化代码,以下是_tWinMain和_tmain的情况: extern "C" int WINAPI _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow) { int nRetCode = 0; if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0)) { TRACE0("Fatal Error: MFC initialization failed.\n"); nRetCode = 1; } else { // Actual WinMain codes ... AfxWinTerm(); } return nRetCode; } int _tmain(int argc, TCHAR* argv[], TCHAR* envp[]) { int nRetCode = 0; if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0)) { cerr << _T("Fatal Error: MFC initialization failed") << endl; nRetCode = 1; } else { // Actual main codes ... AfxWinTerm(); } return nRetCode; } 此外,在Virtual C++ 6.0创建的Win32 Dynamic-Link Library中也可以单独使用MFC,这样可以避免Project被MFC AppWizard和ATL COM AppWizard添加CWinApp实例,方法简单,如下构造Project的DllMain函数即可: #include <afxdllx.h> static AFX_EXTENSION_MODULE ProjectDLL = { NULL, NULL }; extern "C" int APIENTRY DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved) { // Remove this if you use lpReserved. UNREFERENCED_PARAMETER(lpReserved); if (dwReason == DLL_PROCESS_ATTACH) { // Extension DLL one-time initialization. if (!AfxInitExtensionModule(ProjectDLL, hInstance)) { TRACE0("Project.DLL initialize its extension module failed!\n"); return FALSE; }
// CDynLinkLibrary’s destructor will be called in AfxTermExtensionModule. new CDynLinkLibrary(ProjectDLL); } elseif (dwReason == DLL_PROCESS_DETACH) { TRACE0("Project.DLL terminating...\n"); // Terminate the library before destructors are called. AfxTermExtensionModule(ProjectDLL); } return TRUE; // ok. } |
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