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   <TITLE>Internet - Using the Web Browser control (IE3)</TITLE>
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<CENTER><H3><FONT COLOR="#AOAO99">Using the Web Browser control (IE3)</FONT></H3></CENTER>
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<p>This article was contributed by <a href="mailto:danielh@mail.matco.ro">Daniel Harth</a>.
</p>


<P><FONT>Internet Explorer 3+ comes with a Web Browser ActiveX
control that you can use to add HTML viewing capabilities to your application.
In fact, IExplore.exe is a very small application that is simply a host
for this control. The most important interface that is used to interact
with it is <B>IWebBrowser</B>, declared in the <B>exdisp.h</B> file that
is included with Visual C 5.0. The newer <B>IWebBrowser2</B> interface
adds a few new methods but is only supported by Internet Explorer 4, and
its definition is not included with Visual C 5.0. However you can use Developer
Studio to generate a wrapper class for it.</FONT>

<P><FONT>The Visual C 5.0 <B>uuid.lib</B> doesn抰 include the definition
of IID_IWebBrowser and CLSID_WebBrowser, but these GUIDs can be easly found
in <B>exdisp.h</B> or the registry. This is what I came up this:</FONT>

<P><FONT COLOR="#800000"><FONT>/* EAB22AC1-30C1-11CF-A7EB-0000C05BAE0B
*/</FONT></FONT>
<BR><FONT COLOR="#800000"><FONT>IID const IID_IWebBrowser={0xEAB22AC1,
0x30C1, 0x11CF, 0xA7, 0xEB, 0x00, 0x00, 0xC0, 0x5B, 0xAE, 0x0B};</FONT></FONT>

<P><FONT COLOR="#800000"><FONT>/* 8856F961-340A-11D0-A96B-00C04FD705A2
*/</FONT></FONT>
<BR><FONT COLOR="#800000"><FONT>CLSID const CLSID_WebBrowser={0x8856F961,
0x340A, 0x11D0, 0xA9, 0x6B, 0x00, 0xC0, 0x4F, 0xD7, 0x05, 0xA2};</FONT></FONT>

<P><FONT>You can use an ActiveX control in you application by using
CWnd::CreateControl. Make sure that you call <B>AfxEnableControlContainer()</B>
in your <B>CWinApp::InitInstance()</B>. After you created it you can use
CWnd::GetControlUnknown to retreive the control抯 IUnknown and then you
can QueryInterface it for IID_IWebBrowser.</FONT>

<P><FONT COLOR="#800000"><FONT>m_wndBrowser.CreateControl(CLSID_WebBrowser,
lpszWindowName, WS_VISIBLE|WS_CHILD, rect, this, AFX_IDW_PANE_FIRST);</FONT></FONT>
<BR><FONT COLOR="#800000"><FONT>IUnknown *pUnk=m_wndBrowser.GetControlUnknown();</FONT></FONT>
<BR><FONT COLOR="#800000"><FONT>IWebBrowser *pBrowser;</FONT></FONT>
<BR><FONT COLOR="#800000"><FONT>HRESULT hr=pUnk->QueryInterface(IID_IWebBrowser,
(void **)&amp;pBrowser);</FONT></FONT>

<P><FONT>After the control is set up you can use the <B>Navigate</B>
method to browse a page.</FONT>

<P><FONT COLOR="#800000"><FONT>CString url("http://www.microsoft.com/");</FONT></FONT>
<BR><FONT COLOR="#800000"><FONT>BSTR bUrl=url.AllocSysString();</FONT></FONT>
<BR><FONT COLOR="#800000"><FONT>COleVariant vNull(LPCTSTR)NULL,
VT_BSTR);</FONT></FONT>
<BR><FONT COLOR="#800000"><FONT>hr=pBrowser->Navigate(bUrl, &amp;vNull,
&amp;VNull, &amp;vNull, &amp;vNull);</FONT></FONT>

<P><FONT>The example I wrote views a web page in a MDI child window.
Click <A HREF="webbrowser_control.zip" tppabs="http://www.codeguru.com/internet/webbrowser_control.zip">here</A> to download it. For more information
on this control download the Internet Client SDK documentation that is
available at <A HREF="http://www.microsoft.com/">Microsoft抯</A> web site.</FONT>
<BR>


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