FIX: Calling CHttpFile::ErrorDlg Function Causes Errors 127 & 2

   if (dwRet == HTTP_STATUS_DENIED)
   {
       DWORD dwPrompt;

       //dwPrompt = pFile->ErrorDlg(NULL,
       //ERROR_INTERNET_INCORRECT_PASSWORD,
       //FLAGS_ERROR_UI_FLAGS_GENERATE_DATA |
       //FLAGS_ERROR_UI_FLAGS_CHANGE_OPTIONS, NULL);

       LPVOID lpEmpty;

       dwPrompt = ::InternetErrorDlg(GetDesktopWindow(), *pFile,
                                     ERROR_INTERNET_INCORRECT_PASSWORD,
                                     FLAGS_ERROR_UI_FLAGS_GENERATE_DATA
                                   | FLAGS_ERROR_UI_FLAGS_CHANGE_OPTIONS,
                                     &lpEmpty);

       if (dwPrompt != ERROR_INTERNET_FORCE_RETRY)
   ...
				

MORE INFORMATION

When you run the MFC Internet Tear sample, an error is reported and the program fails if the site being accessed uses Basic Authentication without allowing anonymous access and with NTLM turned off.

It is also possible to collect the User Name and Password yourself and send a new request for data, as in the following example:

   if (dwRet == HTTP_STATUS_DENIED)
   {
       cerr << "This page is password protected. " << endl;
       CHAR szUser[50]="";
       CHAR szPass[50]="";

       cerr << "User: "; cin  >> szUser;
       // This should really not show the password on the screen.
       cerr << "Pass: "; cin  >> szPass;

       // You have to read all outstanding data on the Internet handle
       // before you can resubmit the request. Just discard the data.

       CString strBuff;
       while (pFile->ReadString(strBuff))
       {
       }

       pServer->SetOption(INTERNET_OPTION_USERNAME, szUser,
                          lstrlen(szUser));
       pServer->SetOption(INTERNET_OPTION_PASSWORD, szPass,
                          lstrlen(szPass));

       pFile->SendRequest();
   ...
				

Notice that SetOption is being called on the CHttpConnection per the InternetSetOption documentation in Visual C++ which states the following: Calling SetOption on the CInternetSession will result in an Access violation in WinInet.dll.