A site for mshtml interface

Andrew Quinn AUS

Hi, Are the HTML pages yours (or public sites)? If they are yours then the easiest thing to do is the following: In your pages include the tag (with the src attr empty) and an ID, e.g.

Then in your OnDocumentComplete event in VC++ you can run the following code:

MSHTML::IHTMLDocument2Ptr spDoc(m\_ctlWeb1.GetDocument());
if (spDoc)
{
	// Find the BGSOUND tag...
	MSHTML::IHTMLDocument3Ptr spDoc3 = spDoc;
	if (spDoc3)
	{
		// you could also use getElementByTagName but for simplicity...
		MSHTML::IHTMLElementPtr spElem2 = spDoc3->getElementById(\_bstr\_t("idSound1"));
		if (spElem2)
		{
			MSHTML::IHTMLBGsoundPtr spBG = spElem2;
			if (spBG)
			{
				CString strURL = \_T("http://server/eg/alert.wav");
				spBG->put\_src(\_bstr\_t(strURL));
			}
		}
	}
}

If they are public sites and you are trying to inject a into them - this will be a little bit more work... Firstly, we need to get DOM to create us an element, and then insert it into the document. As before, we do this in the OnDocumentComplete event...

MSHTML::IHTMLElementPtr spElem = spDoc->createElement(\_T("BGSOUND"));
if (spElem)
{
	MSHTML::IHTMLBGsoundPtr spBG = spElem;
	if (spBG)
	{
		CString strURL = \_T("http://server/eg/alert.wav");
		spBG->put\_src((bstr\_t)strURL);

		// get the DOMNode interface for the BODY...
		MSHTML::IHTMLDOMNodePtr spBody = spDoc->body;
		// get the DOMNode interface for the element we wish to add...
		MSHTML::IHTMLDOMNodePtr spNode2Add = spBG;

		if (spBody != NULL && spNode2Add != NULL)
		{
			// append new element to BODY
			spBody->appendChild(spNode2Add);
		}
	}
}

And that's it :) Hope this helps, Andy

User 527726

Thank you Andy,but My view is not derived from CHTMLView my view is derived from CView,IOleInPlaceFrame and IOleCommandTarget and iam using my own html pages.I think IHTMLBGsound is not supported in it ( I tried to paste it using pasteHTML). lokesh

Andrew Quinn AUS

Hi again, Neither was my test app. I created a test app and inserted the WebBrowser ActiveX Control into the dialog. Then used the Event sinking (through class wizard) to handle the DocumentComplete event, e.g.

BEGIN_EVENTSINK_MAP(CWebTest1Dlg, CDialog)
//{{AFX_EVENTSINK_MAP(CWebTest1Dlg)
ON_EVENT(CWebTest1Dlg, IDC_EXPLORER1, 259 /* DocumentComplete */, OnDocumentCompleteExplorer1, VTS_DISPATCH VTS_PVARIANT)
//}}AFX_EVENTSINK_MAP
END_EVENTSINK_MAP()

The BGSOUND element was available from IE3, and available in script from IE4 so I can't see that it's not supported. How are you using the Web Control in your app? Cheers, Andy

User 527726

I got a DHTMLED sample from msdn (just enter DHTMLED in search).Run the exe and You will find a folder sample/Edit/. I want IhtmlBGsound implemented in it. Thank you for following it up. lokesh

User 527726

I got a DHTMLED sample from msdn (just enter DHTMLED in search in MSDN).Run the exe and You will find a folder sample/Edit/. I want IhtmlBGsound implemented in it. Thank you for following it up. lokesh

Andrew Quinn AUS

Hi lokesh, I've had no luck finding this sample project. Do you have a link to it? I tried online MSDN as well as the MSDN Library Disks (Jan 2003) Cheers, Andy

User 527726

The site is . or just type "DHTMLED" in google and click the first one. lokesh

User 527726

http://msdn.microsoft.com/downloads/samples/internet/default.asp?url=/downloads/samples/internet/browser/editcntrl/default.asp lokesh

Andrew Quinn AUS

Hi lokesh, Right I found the project you are on about. Just to clarify - it was the CEdit project was it not? Anyway I've had a look and have got it to insert the BGSOUND element. This project must have been written way way back and is a very verbose way of doing things. Anyway I digress. This is what I did: Firstly, we what to inject the element on the Document Complete event but because this is an old application we have to do it the old way. Events from the HTMLDOMDocument are handled by the CImpIDispatch class in DOCEVENT.cpp, we can tell this because in the crtview.cpp you see the following line:

hr = m_pConnectionPoint->Advise( m_pDocEvents, &m_dwConnectCookie );

So we are setting the object for the DOMDocument to call us back on. Then in the CImpIDispatch class, we need to look for the ::Invoke method, this is what will get called whenever any events take place - dispIdMember parameter will hold what event it actually is (see MSDN for all the events) The event we are interested in is: DISPID_HTMLDOCUMENTEVENTS_ONREADYSTATECHANGE readyState is a property of the document that tells you what the state of it is - we want to wait for it to be "complete" So here is the code I used in the ::Invoke method:

USES\_CONVERSION;

if ( dispIdMember == DISPID\_HTMLDOCUMENTEVENTS\_ONREADYSTATECHANGE )
{
	MSHTML::IHTMLDocument2Ptr spDoc(m\_pView->m\_pSite->GetObjectUnknown());
	if (spDoc)
	{
		CString strState = OLE2T(spDoc->readyState);
		if (strState == \_T("complete"))
		{
			MSHTML::IHTMLElementPtr spElem = spDoc->createElement(\_T("BGSOUND"));
			if (spElem)
			{
				MSHTML::IHTMLBGsoundPtr spBG = spElem;
				if (spBG)
				{
					CString strURL = \_T("http://www.htmlcodetutorial.com/sounds/hazy\_shade\_of\_winter.mid");
					spBG->put\_src(T2OLE(strURL));

					// get the BODY element
					MSHTML::IHTMLDOMNodePtr spBody = spDoc->body;
					// and the IHTMLDOMNode interface of the new element
					MSHTML::IHTMLDOMNodePtr spNode2Add = spBG;
					// append new element to BODY
					spBody->appendChild(spNode2Add);
				}

			}
		}
	}
}

Now you may notice that above I'm using the smart pointer implementation for COM calling - I did start doing in the traditional way but I got so bored with doing QueryInterface all the time. So add the following to the top of the cpp file:

#import "C:\Windows\system32\mshtml.tlb" no_auto_exclude

Actually there is another reason - the mshtml.h file that i

User 527726

Super!Super! U GOT IT RIGHT MAN... ITS WORKING.... THANKYOU VERY MUCH. Iam just new to vc++ especially to com. I would be pleased if u guide me or teach me this thing from basics( Even some material would do).My email id is itslokeshk@yahoo.co.in and would be pleased to yours too. Thank you very much...once again. bye..:-D lokesh