C / C++ / MFC

<br />
	LPVOID lpMsgBuf;	//	Pointer to buffer to receive the error message<br />
<br />
	DWORD dwRet = ::FormatMessage( <br />
		           FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_ALLOCATE_BUFFER,<br />
				   NULL, <br />
				   iErrCode,<br />
				   MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US),<br />
				   (LPTSTR) &lpMsgBuf,<br />
				   0,<br />
				   NULL);<br />
<br />
	if (dwRet == 0)		//	if no message retreived<br />
	{		//		check for network-related error<br />
			HMODULE hDll = ::LoadLibraryEx( TEXT("netmsg.dll"), NULL, <br />
			                            DONT_RESOLVE_DLL_REFERENCES );<br />
			{<br />
				if (hDll != NULL)<br />
				{<br />
					dwRet = FormatMessage(<br />
							FORMAT_MESSAGE_FROM_HMODULE | FORMAT_MESSAGE_FROM_SYSTEM,<br />
							hDll,<br />
							iErrCode,<br />
							MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US),<br />
							(LPTSTR) &lpMsgBuf,<br />
							0,<br />
							NULL);<br />
					::FreeLibrary(hDll);<br />
				}<br />
			}<br />
	}<br />
<br />
	if ( m_pszErrMessage!=NULL )<br />
	{<br />
		delete []m_pszErrMessage;<br />
		m_pszErrMessage = NULL;<br />
	}<br />
<br />
	if (lpMsgBuf != NULL)<br />
	{<br />
		m_pszErrMessage = new TCHAR[dwRet+1];<br />
		::strcpy( m_pszErrMessage, (TCHAR*)lpMsgBuf );<br />
		m_pszErrMessage[dwRet-2 ] = 0;<br />
		::LocalFree( lpMsgBuf );<br />
	}<br />
	else<br />
	{<br />
		m_pszErrMessage = new TCHAR[<br />
				strlen("Unknown error in evaluating Error Code")+1];<br />
<br />
		::strcpy(m_pszErrMessage, "Unknown error in evaluating Error Code");<br />
	}<br />

<br />
HMODULE hModule = NULL; // default to system source<br />
LPSTR MessageBuffer;<br />
DWORD dwBufferLength;<br />
<br />
DWORD dwFormatFlags = FORMAT_MESSAGE_ALLOCATE_BUFFER |<br />
        FORMAT_MESSAGE_IGNORE_INSERTS |<br />
        FORMAT_MESSAGE_FROM_SYSTEM ;<br />
<br />
    //<br />
    // If dwLastError is in the network range, <br />
    //  load the message source.<br />
    //<br />
<br />
if(dwLastError >= NERR_BASE && dwLastError <= MAX_NERR){<br />
  hModule = LoadLibraryEx(TEXT("netmsg.dll"), NULL,       LOAD_LIBRARY_AS_DATAFILE);<br />
<br />
   if(hModule != NULL)<br />
     dwFormatFlags |= FORMAT_MESSAGE_FROM_HMODULE;<br />
}<br />
<br />
    //<br />
    // Call FormatMessage() to allow for message <br />
    //  text to be acquired from the system <br />
    //  or from the supplied module handle.<br />
    //<br />
<br />
    if(dwBufferLength = FormatMessageA(<br />
        dwFormatFlags,<br />
        hModule, // module to get message from (NULL == system)<br />
        dwLastError,<br />
        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // default language<br />
        (LPSTR) &MessageBuffer,<br />
        0,<br />
        NULL<br />
        ))<br />
    {<br />
        DWORD dwBytesWritten;<br />
<br />
        //<br />
        // Output message string on stderr.<br />
        //<br />
        WriteFile(<br />
            GetStdHandle(STD_ERROR_HANDLE),<br />
            MessageBuffer,<br />
            dwBufferLength,<br />
            &dwBytesWritten,<br />
            NULL<br />
            );<br />
<br />
        //<br />
        // Free the buffer allocated by the system.<br />
        //<br />
        LocalFree(MessageBuffer);<br />
    }<br />
<br />
    //<br />
    // If we loaded a message source, unload it.<br />
    //<br />
    if(hModule != NULL)<br />
        FreeLibrary(hModule);<br />

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