How to invoke IE through Com component in vc++

You can use IAuthenticate for that purpose, see http://msdn2.microsoft.com/en-us/library/ms775080.aspx and http://msdn2.microsoft.com/en-us/library/ms775079.aspx

BTW, see also the example at http://www.microsoft.com/downloads/details.aspx?familyid=5255950D-ED9A-419D-BDA3-55FBE6E21F57&displaylang=en ("Sample: Using IAuthenticate to Bind to Secured Web Page")

Hi,

I am not using IAuthenticate can you please clarify where exactly I can modify the code or how i can go about:
I have used CComQIPtr<IWebBrowser2> m_pWebBrowser1;
m_pWebBrowser1.CoCreateInstance(CLSID_InternetExplorer);
hr = m_pWebBrowser1->Navigate2(.....)

Where can I used the interface that you have quoted.

Can you please elaborate with an example if possible which could help me know exactly the solution.

Thanks.

Plese check the example linked above, that would be a little too much code to post here.

   Navigate2 Method
    http://msdn2.microsoft.com/en-us/library/aa752094.aspx

I assume that the URL looks something like:

     http://www.someWebSite.com/login?id=theUser&pswd=thePassword

That is a HTTP GET transaction.  If so, you can change to using the POST version of that call:  Populate the 4th parameter with a string that contains all of the stuff after the
    ?
in the URL.  That will hide it from view.

If the website requires the other kind of security (where the browser pops up a gray box requesting the user and password) then you can send that data in the 5th parameter.  You need to create a header line in the format:

Authorization: Basic %s\r\n

where %s is a string in the format
   user:password
and it has been base64-encoded.  If this is the need, let me know and I'll explain further.
 
-- Dan

Hi Dan,

Yes when we are sending the user id and password in the URL it can be easily interpreted. Though I am able to login to the site.

The best would be to use Post method to open the URL. But there should be no dialog opening up it should happen without that and once the link is clicked it should happen smoothly with no further authentication.

Can you please explain how it can be encoded or invoked using POST method.

---Arun.

If a GET URL works, then a POST URL should also work -- without poping up a dialog box.

Just do as I recommended:  Put the stuff that normally comes after the
   ?
into the 4th parameter (the PostData) and remove all of it (including the ?) from the first parameter (the URL).

-- Dan

Hi Dan,

I have done that but still it's not working. I invoked using:

            hr = m_pWebBrowser2->Navigate2(&vaURL,
                        COleVariant((long) 0, VT_I4),
                        COleVariant((LPCTSTR)NULL, VT_BSTR),
                        &vaLoginCredent,
                        COleVariant((LPCTSTR)NULL, VT_BSTR)
                        );

where vaURL contains: www.<<URL>>
and vaLoginCredent contains: <<Crerdentials = <<...>> UserID= <<UID>> Password=<<PWD>>

Please let me know where I am going wrong.

Thanks,
Arun.

First, the POST data should look the same as when it is in the URL, including the ampersand (&) signs.  For instance,

  Credentials=blahBlah&UserID=blechBlech&Password=fooFoo

Next, the first parameter should be a Variant.  I can't tell what it is in your code.  But since you are using
        &vaURL,
I can tell that you are passing a pointer to something, which may be incorrect.  An example usage is here:

    How To Automate Internet Explorer to POST Form Data
    http://support.microsoft.com/kb/q167658/

I'm seeing that the fourth parmeter must be a VARIANT of type
   VT_ARRAY | VT_UI1
that is, a SafeArray of bytes, so we can't just pass a simple string.

A sequence like this will work:

      COleVariant vaUrl= (LPCSTR)"http://www.somesite.com/account/login,asp";

      char* szFormData= "userName=SomeName&userPswd=SomePassword";

      COleSafeArray vaFormdata;
      DWORD dwPostDataLen= lstrlen( szFormData );
      vaFormdata.CreateOneDim( VT_UI1, dwPostDataLen, szFormData );

      m_Browser.Navigate2( vaUrl, 0, 0, vaFormdata, 0 );

-- Dan

Thanks Dan for the effort but it still doesn't work.
I have done the way you guided me Dan, please refer below:

CString strBrowseToURL = "http://" + strURL +"/" + strFolder;
CString strLoginCredent = "Credentials="+ str +"&userid=" + strUserId +"&password=" + strPassword;
            
char *szFormData = strLoginCredent.GetBuffer(strLoginCredent.GetLength());
strLoginCredent.ReleaseBuffer();
COleSafeArray vaFormdata;
DWORD dwPostDataLen = lstrlen( szFormData );
vaFormdata.CreateOneDim( VT_UI1, dwPostDataLen, szFormData );

CoInitialize(NULL);
CComQIPtr<IWebBrowser2>      m_pWebBrowser2;
m_pWebBrowser2.CoCreateInstance(CLSID_InternetExplorer);
COleVariant vaURL((LPCTSTR)strBrowseToURL);
hr = m_pWebBrowser2->Navigate2(&vaURL,
COleVariant((long) 0, VT_I4),
COleVariant((LPCTSTR)NULL, VT_BSTR),
&vaFormdata,
COleVariant((LPCTSTR)NULL, VT_BSTR));

Guess I am missing something. I will see what's going wrong.

Thanks,
Arun.

Thanks Dan. Infact I was waiting to verify the above said code with the other dev team.

Thank you once again.

---Arun.