Tag: Trident (layout engine)
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Howto: Ignoring web browser certificate errors in a webbrowser host
The webbrowser queries host services via IServiceProvider implemented on the ActiveX host. One of the services is IHttpSecurity, which can be used to override the certificate problem dialog. Security warning: ignoring security problems can compromise your application. IHttpSecurity is derived from IWindowForBindingUI, so the host needs to implement it too. In Windows forms, customizing certificate error handling…
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Howto: reset IE security zone settings programmatically
Internet Explorer 7 introduced the IInternetZoneManagerEx2 interface, which has a FixUnsecureSettings method to reset all security zone settings. Like all other IInternetZoneManager* interfaces, you can query this interface from the internet zone manager object: IInternetZoneManagerEx2* pzoneManager=NULL; HRESULT hr=CoCreateInstance(CLSID_InternetZoneManager ,NULL,CLSCTX_INPROC_SERVER,IID_IInternetZoneManagerEx2,(LPVOID*)&pzoneManager); if(hr==S_OK && pzoneManager!=NULL) { hr=pzoneManager->FixUnsecureSettings(); } There’s another CoInternetCreateZoneManager function to get the zone manager object’s IInternetZoneManager interface.
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Application crash when forcing IE8 rendering mode in webbrowser host
User stephench is reporting that when setting webbrowser rendering mode to IE8 via FEATURE_BROWSER_EMULATION, the app would crash. The web site crashes IE8 too, but IE8 is able to recover and automatically switch to IE7 mode, while a webbrowser host crash in WinInet when switching to the compatibility mode (Note the ReloadInCompatView function on the…
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How to force popup window to navigate in the same window in a webbrowser control
When clicking on an link that targets a new window, the default behavior of a webbrowser control host application is to open a new window in Internet Explorer. User ben_lai wants to know how to handle the click and navigate to the same window. There are three events that notifies a new window, NewWindow (The…
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Intercept the download dialog in webbrowser control
User rsd102 looks already find the solution to his question when he posted the question to CSDN, except for one missing piece. The sample he found is for overriding the global download manager, and what he need is a process wide override. It looks like rsd102 is loving research. He found more than he can…
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Make the webbrowser control styled the same way as the hosting application
User wtx_sonery wants to know whether it is possible to style the webbrowser control with the rest of the application. The answer is yes, you can implement IDocHostUIHandler’s GetHostInfo method and return DOCHOSTUIFLAG_THEME in the host flags. IDocHostUIHandler is already implemented in MFC and ATL. For MFC there are CHtmlControlSite and CBrowserControlSite but you should…
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How to change the user agent and download control flags in a webbrowser control host
User vnetvvv wants to know how to change the user agent string in a VB6 webbrowser control. The knowledge base article PRB: WebBrowser Control Clients Share Global Settings provides the necessary code for changing the user agent of the webbrowser control when the webbrowser ask for it. But how to have the webbrowser control ask…
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How to disable navigation sound in webbrowser control
User kill211 does not like the click sound when he calls WebBrowser.Navigate. He wonders if there is a way to disable it without modifying HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Explorer\Navigating, which has effect on other applications. Unfortunately, the API for disabling sound is introduced in IE7. The FEATURE_DISABLE_NAVIGATION_SOUNDS feature can be toggled using registry or the CoInternetSetFeatureEnabled API. Update: A…
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Walkaround for Error : An add-on for this website failed to run. When opening Visual C++’s Add Variable Wizard after IE 8 is installed
Update: it looks like a lot of people are hitting this page by mistake. If you don’t write software for a living then this page is probably not for you. Download: https://jiangsheng.net/Documents/IE8AddZone.zip Prerequisite: Microsoft Visual C++ 2005 SP1 Redistributable Package (x86) This program is designed to temporary circumvent the “An add-on for this web site…
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Error: Unable to cast COM object of type ‘mshtml.HTMLDocumentClass’ to interface type ‘ICustomDoc’
This operation failed because the QueryInterface call on the COM component for the interface with IID ‘{3050F3F0-98B5-11CF-BB82-00AA00BDCE0B}’ failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)). My first reaction was:”What the hell? HTMLDocumentClass is the managed wrapper of MSHTML, and MSHTML is supposed to support the ICustomDoc interface!” Now…
Sheng Jiang 蒋晟 