launching dll from mfc exe...

Discussion in 'MFC' started by sujan.dasmahapatra, Oct 23, 2011.

  1. sujan.dasmahapatra

    sujan.dasmahapatra Member

    Jun 11, 2009
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    Now I am not calling the dll from not winn32 but from another mfc exe application. Where I have a button when I press it I should load the dll and launch the mainwindow. See my two apis
    void CClientRevProjDlg::OnBnClickedButton1()
     typedef VOID (*MYPROC)(HWND);
        HINSTANCE hinstLib;
        MYPROC ProcAdd;
        BOOL fFreeResult, fRunTimeLinkSuccess = FALSE;
     HWND h = AfxGetMainWnd()->GetSafeHwnd();
        // Get a handle to the DLL module.
        hinstLib = LoadLibrary(L"C:\\Users\\DasmahapatraS\\Projects\\Bhagavan_Cadem\\RevolutionProj\\debug\\RevolutionProj.dll");
        // If the handle is valid, try to get the function address.
        if (hinstLib != NULL)
            ProcAdd = (MYPROC) GetProcAddress(hinstLib, "runAppli");
        // Do add operation
        // If the function address is valid, call the function.
            if (fRunTimeLinkSuccess = (ProcAdd != NULL))
                (ProcAdd) (h);
            // Free the DLL module.
            fFreeResult = FreeLibrary(hinstLib);
        // If unable to call the DLL function, use an alternative.
        if (! fRunTimeLinkSuccess)
            printf("message via alternative method\n");
    //And in the dll App.cpp I have an extern "C" like this....
    extern "C" BOOL __declspec(dllexport) runAppli(HWND h)
    // HWND h = AfxGetMainWnd()->GetSafeHwnd();
     return true;
    With this when I press the run button from client exe, my dll mainwindow is shown but crashing and hanging for sometime. Please help me get rid of this problem someone Thanks a lot.
    Last edited by a moderator: Oct 24, 2011

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