Detailed info for COM based "Web Browser" control in VS.NET 2003

's Computer Specifications

Hi there,

Can some one point me toward detailed tutorials / resources as to how to use
the COM based web browser control (not the manged WebBroser Control in C#
2.0) in wnforms ? How to access the contents of the page that is being
visited by the user ? is there any sample code that shows how to do this ?
is there a managed component made by some one which encapsulates the COM web
browser component and can be used in v 1.1 ?

Thanks.

's Computer Specifications

Hi Ahmed,
I have been looking into this for the last few days. It's ot so easy to
work with an embedded browser due to the lack of informaiont.

You need to add a reference to MSHTML.dll to your project.

See here for info about mshtml.dll;
http://msdn.microsoft.com/workshop/b...w/overview.asp

The diagram here helps for understanding;
http://msdn.microsoft.com/workshop/b...w/overview.asp

Do a search on google for webbrowser and mshtml and the like and you will
find some info.

I am still working through this stuff now.

Here are some code scraps I have found;

' This sample handler code for the WebBrowser
DWebBrowserEvents2:

ocumentComplete event
'demonstrates how to determine if this event is for the top frame, which
indicates that the
'HTML page has loaded. This sample also demonstrates how to create a
stream from a block of
'memory-in this case a string that contains the HTML content to be
displayed.
'void myObject:

ocumentComplete(LPDISPATCH pDisp, VARIANT* URL)
'{
' HRESULT hr;
' IUnknown* pUnkBrowser = NULL;
' IUnknown* pUnkDisp = NULL;
' IStream* pStream = NULL;
' HGLOBAL hHTMLText;
' static TCHAR szHTMLText[] = "<html><h1>Stream Test</h1><p>This HTML
content is/
' being loaded from a stream.</html>";

' // Is this the DocumentComplete event for the top frame window?
' // Check COM identity: compare IUnknown interface pointers.
' hr = m_pBrowser->QueryInterface( IID_IUnknown,
(void**)&pUnkBrowser );
' if ( SUCCEEDED(hr) )
' {
' hr = pDisp->QueryInterface( IID_IUnknown, (void**)&pUnkDisp );
' if ( SUCCEEDED(hr) )
' {
' if ( pUnkBrowser == pUnkDisp )
' { // This is the DocumentComplete event for the top
' // frame - page is loaded!
' // Create a stream containing the HTML.
' // Alternatively, this stream may have been passed to
us.

' size_t = cchLength;
' // TODO: Safely determine the length of szHTMLText in
TCHAR.
' hHTMLText = GlobalAlloc( GPTR, cchLength+1 );

' if ( hHTMLText )
' {
' size_t cchMax = 256;
' StringCchCopy((TCHAR*)hHTMLText, cchMax + 1,
szHTMLText);
' // TODO: Add error handling code here.

' hr = CreateStreamOnHGlobal( hHTMLText, TRUE,
&pStream );
' if ( SUCCEEDED(hr) )
' {
' // Call the helper function to load the browser
from the stream.
' LoadWebBrowserFromStream( m_pBrowser,
Stream );
' pStream->Release();
' }
' GlobalFree( hHTMLText );
' }
' }
' pUnkDisp->Release();
' }
' pUnkBrowser->Release();
' }
'}

' An application would show the progress bar in response to
DownloadBegin,
'update the progress bar in response to ProgressChange, and hide the
progress bar
'in response to DownloadComplete.

'Dim hDoc As New mshtml.HTMLDocument
'Do
' hDoc = WebBrowser1.Document()
'Loop While hDoc Is Nothing
'hDoc.getElementsByTagName("a").item(2).Click()

's Computer Specifications

Ahmed,
Let me know what you find out and I will keep you posted also.

My personal e-mail address is;

news
at
carthew
..
net

's Computer Specifications

Hi

There is not such a dedicated C# version webbrowser course.
Anyway, since so far we still use the com based webbrowser(managed one will
be released in whidbey), so it's object modal and interface is the same as
the C++ ones.

IWebBrowser2 Interface
http://msdn.microsoft.com/library/de...owser/webbrows
er/reference/ifaces/iwebbrowser2/iwebbrowser2.asp

WebBrowser Control
http://msdn.microsoft.com/library/de...owser/webbrows
er/reference/ifaces/iwebbrowser2/iwebbrowser2.asp

To manipulate the document inside the webbrowser, we need the mshtml
library which has a managed wrap in the .NET(microsoft.mshtml.dll)
MSHTML Reference
http://msdn.microsoft.com/library/de...owser/webbrows
er/reference/ifaces/iwebbrowser2/iwebbrowser2.asp

Here are a few links for your reference.

How To Get Width and Height from the Window.Open Method Inside the
WebBrowser Host by Using Visual C# .NET (313966)
http://support.microsoft.com/default...B;EN-US;313966

Multi Tab WebBrowser
http://www.codeproject.com/useritems...WebBrowser.asp

Best regards,

Peter Huang
Microsoft Online Partner Support

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