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copied!<p>As explained by CodeBlock, this seems to be related by the installation state of <code>Microsoft.mshtml.dll</code></p> <p>We've got customers where the <code>Microsoft.mshtml.dll</code> is not present in GAC (nor in computer), and then the <code>WebBrowser</code> component never fires any event.</p> <p>By using Reflector in the <code>WebBrowser</code> class, the <code>DocumentComplete</code> event is raised by a subclass named <code>WebBrowserEvent</code>, which implement a private interface <code>DWebBrowserEvents2</code>.</p> <p>This interface is a <code>ComImport</code> of <code>{34A715A0-6587-11D0-924A-0020AFC7AC4D}</code>, which, I suppose, is related to Microsoft.mshtml.dll.</p> <p>So our solution was to install <a href="http://www.microsoft.com/downloads/details.aspx?familyid=3C9A983A-AC14-4125-8BA0-D36D67E0F4AD&displaylang=en" rel="noreferrer" title="Office 2003 Update: Redistributable Primary Interop Assemblies">the Office 2003 Redistributable Primary Interop Assemblies</a>, which install the DLL on Program Files then register it on the GAC.</p> <p>Note : Don't pay attention to the .NET Framework 1.1 required or office required, it just copies some dlls.</p> <p>Note 2 : The <a href="http://www.microsoft.com/downloads/details.aspx?familyid=59DAEBAA-BED4-4282-A28C-B864D8BFA513&displaylang=en" rel="noreferrer" title="2007 Microsoft Office System Update: Redistributable Primary Interop Assemblies">2007 package</a> seems to include the same dll.</p>

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