Microsoft KB Archive/173974

= How to add MFC support to an ATL project in Visual C++ =

Article ID: 173974

Article Last Modified on 6/2/2005

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APPLIES TO

 Microsoft ActiveX Template Library 3.0, when used with:  Microsoft Visual C++ 5.0 Enterprise Edition

 Microsoft Visual C++ 6.0 Enterprise Edition

 Microsoft Visual C++ 5.0 Professional Edition

 Microsoft Visual C++ 6.0 Professional Edition</li></ul>

 Microsoft Visual C++ 6.0 Standard Edition</li></ul> </li> Microsoft ActiveX Template Library 2.0, when used with:  Microsoft Visual C++ 5.0 Enterprise Edition</li></ul>

 Microsoft Visual C++ 6.0 Enterprise Edition</li></ul>

 Microsoft Visual C++ 5.0 Professional Edition</li></ul>

 Microsoft Visual C++ 6.0 Professional Edition</li></ul>

 Microsoft Visual C++ 6.0 Standard Edition</li></ul> </li> Microsoft ActiveX Template Library 2.1, when used with:  Microsoft Visual C++ 5.0 Enterprise Edition</li></ul>

<ul> <li>Microsoft Visual C++ 6.0 Enterprise Edition</li></ul>

<ul> <li>Microsoft Visual C++ 5.0 Professional Edition</li></ul>

<ul> <li>Microsoft Visual C++ 6.0 Professional Edition</li></ul>

<ul> <li>Microsoft Visual C++ 6.0 Standard Edition</li></ul> </li></ul>

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This article was previously published under Q173974

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SUMMARY
When creating an ATL EXE project using the AppWizard, the MFC support check box is disabled. This article explains how to add MFC support to an ATL EXE project. This article also explains how to add MFC support to an ATL DLL project if you failed to initially select the "support MFC" check box in the AppWizard.

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Adding MFC Support to an ATL EXE Project
<ol> <li> Add the following #include directives to StdAfx.h prior to including Atlbase.h:      #include <afxwin.h>   // MFC core and standard components #include <afxext.h>  // MFC extensions #include <afxdisp.h> // MFC Automation extensions </li> <li>Change project settings to use MFC. From the Project Settings dialog box, click the General tab, and change the setting in the "Microsoft Foundation Classes" list box to MFC.</li> <li> Add a CWinApp derived class and declare a global variable of that type as follows: class CMyApp : public CWinApp {     public: virtual BOOL InitInstance; virtual int ExitInstance; protected: BOOL m_bRun; };                   </li> <li> Replace the _tWinMain function with the following InitInstance and ExitInstance code: BOOL CMyApp::InitInstance {   // Initialize OLE libraries. if (!AfxOleInit) {       AfxMessageBox(_T("OLE Initialization Failed!")); return FALSE; }

// Initialize CcomModule. _Module.Init(ObjectMap, m_hInstance); _Module.dwThreadID = GetCurrentThreadId;

// Check command line arguments. TCHAR szTokens[] = _T("-/"); m_bRun = TRUE; LPCTSTR lpszToken = FindOneOf(m_lpCmdLine, szTokens); while (lpszToken != NULL) {       // Register ATL and MFC class factories. if (lstrcmpi(lpszToken, _T("Embedding"))==0 ||       lstrcmpi(lpszToken, _T("Automation"))==0) {           AfxOleSetUserCtrl(FALSE); break; }   // Unregister servers. // There is no unregistration code for MFC // servers. Refer to <WWLINK TYPE="ARTICLE" VALUE="Q186212">Q186212</WWLINK> "How To Unregister MFC    // Automation Servers" for adding unregistration // code. else if (lstrcmpi(lpszToken, _T("UnregServer"))==0) {           VERIFY(SUCCEEDED(_Module.UpdateRegistryFromResource(IDR_ServerS2B, FALSE))); //Replace IDR_ServerS2B with your project specific resource ID for the registry script resource VERIFY(SUCCEEDED(_Module.UnregisterServer(TRUE))); m_bRun = FALSE; break; }   // Register ATL and MFC objects in the registry. else if (lstrcmpi(lpszToken, _T("RegServer"))==0) {           VERIFY(SUCCEEDED(_Module.UpdateRegistryFromResource(IDR_ServerS2B, TRUE))); VERIFY(SUCCEEDED(_Module.RegisterServer(TRUE))); COleObjectFactory::UpdateRegistryAll; m_bRun = FALSE; break; }       lpszToken = FindOneOf(lpszToken, szTokens); }   if (m_bRun) {       // Comment out the next line if not using VC 6-generated // code. _Module.StartMonitor;

VERIFY(SUCCEEDED(_Module.RegisterClassObjects(CLSCTX_LOCAL_SERVER, REGCLS_MULTIPLEUSE))); VERIFY(COleObjectFactory::RegisterAll); // To run the EXE standalone, you need to create a window // and assign the CWnd* to m_pMainWnd. LPCTSTR szClass = AfxRegisterWndClass(NULL); m_pMainWnd = new CWnd; m_pMainWnd->CreateEx(0, szClass, _T("SomeName"), 0, CRect(0, 0, 0, 0), NULL, 1234); }   return TRUE; }

int CMyApp::ExitInstance {   // MFC's class factories registration is    // automatically revoked by MFC itself. if (m_bRun) {       _Module.RevokeClassObjects; Sleep(dwPause); //wait for any threads to finish }

_Module.Term; return 0; }                   </li> <li>For Unicode builds, make sure the entry point is set to wWinMainCRTStartup in the Output category of the Link field in the Project Settings dialog box. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

125750 You receive an "unresolved external symbol _WinMain@16" error message when you try to build an MFC application with Unicode support in Visual C++

</li> <li> Add the following line of code to the beginning of every member function of a COM interface, window procedure, and exported function: AFX_MANAGE_STATE(AfxGetAppModuleState); For more information on AFX_MANAGE_STATE, consult the VC++ online documentation. </li></ol>

For more information about adding MFC support to an ATL COM AppWizard project, please see the following article in the Microsoft Knowledge Base:

181505 PRB: ATL COM AppWizard Doesn't Offer MFC Support for .EXE

Adding MFC Support to an ATL DLL Project
Follow steps 1 to 3 from above.

<ol> <li> Move the code in the AppWizard-generated DllMain's DLL_PROCESS_ATTACH and DLL_PROCESS_DETACH to the CMyApp's InitInstance and ExitInstance and remove the DllMain as follows: BOOL CMyApp::InitInstance {        _Module.Init(ObjectMap, m_hInstance); return CWinApp::InitInstance; }

int CMyApp::ExitInstance {   // MFC's class factories registration is    // automatically revoked by MFC itself. if (m_bRun) _Module.RevokeClassObjects;

</li> <li> Add the following line of code to the beginning of every member function of a COM interface, window procedure and exported function: AFX_MANAGE_STATE(AfxGetStaticModuleState); For more information, click the following article number to view the article in the Microsoft Knowledge Base:

140850 How to properly export functions by using the MFC Shared Library

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NOTE: For all release builds, make sure that the _ATL_MIN_CRT preprocessor definition has been removed. You can find these definitions in the Preprocessor category of the C/C++ tab in the Project Settings dialog box.

When adding a class derived from a MFC class using the ClassWizard to an ATL EXE project or to an ATL DLL project without "MFC Support," the compiler will issue a C2504 error.

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