How to deactivate "right click" on WPF Webbrowser Control?

Here is the code of a utility class that allows you to deactivate WPF's WebBrowser context menu. It also allows you to suppress script errors (WPF WebBrowser control - how to supress script errors?) and change IE's DOCHOSTUIFLAG.

Usage sample:

public partial class Player : Window{    private WebBrowserHostUIHandler _wbHandler;    public Player()    {        InitializeComponent();        ...        _wbHandler = new WebBrowserHostUIHandler(MyWebBrower);        _wbHandler.IsWebBrowserContextMenuEnabled = false;    }}

Utility code:

public class WebBrowserHostUIHandler : Native.IDocHostUIHandler{    private const uint E_NOTIMPL = 0x80004001;    private const uint S_OK = 0;    private const uint S_FALSE = 1;    public WebBrowserHostUIHandler(WebBrowser browser)    {        if (browser == null)            throw new ArgumentNullException("browser");        Browser = browser;        browser.LoadCompleted += OnLoadCompleted;        browser.Navigated += OnNavigated;        IsWebBrowserContextMenuEnabled = true;        Flags |= HostUIFlags.ENABLE_REDIRECT_NOTIFICATION;    }    public WebBrowser Browser { get; private set; }    public HostUIFlags Flags { get; set; }    public bool IsWebBrowserContextMenuEnabled { get; set; }    public bool ScriptErrorsSuppressed { get; set; }    private void OnNavigated(object sender, NavigationEventArgs e)    {        SetSilent(Browser, ScriptErrorsSuppressed);    }    private void OnLoadCompleted(object sender, NavigationEventArgs e)    {        Native.ICustomDoc doc = Browser.Document as Native.ICustomDoc;        if (doc != null)        {            doc.SetUIHandler(this);        }    }    uint Native.IDocHostUIHandler.ShowContextMenu(int dwID, Native.POINT pt, object pcmdtReserved, object pdispReserved)    {        return IsWebBrowserContextMenuEnabled ? S_FALSE : S_OK;    }    uint Native.IDocHostUIHandler.GetHostInfo(ref Native.DOCHOSTUIINFO info)    {        info.dwFlags = (int)Flags;        info.dwDoubleClick = 0;        return S_OK;    }    uint Native.IDocHostUIHandler.ShowUI(int dwID, object activeObject, object commandTarget, object frame, object doc)    {        return E_NOTIMPL;    }    uint Native.IDocHostUIHandler.HideUI()    {        return E_NOTIMPL;    }    uint Native.IDocHostUIHandler.UpdateUI()    {        return E_NOTIMPL;    }    uint Native.IDocHostUIHandler.EnableModeless(bool fEnable)    {        return E_NOTIMPL;    }    uint Native.IDocHostUIHandler.OnDocWindowActivate(bool fActivate)    {        return E_NOTIMPL;    }    uint Native.IDocHostUIHandler.OnFrameWindowActivate(bool fActivate)    {        return E_NOTIMPL;    }    uint Native.IDocHostUIHandler.ResizeBorder(Native.COMRECT rect, object doc, bool fFrameWindow)    {        return E_NOTIMPL;    }    uint Native.IDocHostUIHandler.TranslateAccelerator(ref System.Windows.Forms.Message msg, ref Guid group, int nCmdID)    {        return S_FALSE;    }    uint Native.IDocHostUIHandler.GetOptionKeyPath(string[] pbstrKey, int dw)    {        return E_NOTIMPL;    }    uint Native.IDocHostUIHandler.GetDropTarget(object pDropTarget, out object ppDropTarget)    {        ppDropTarget = null;        return E_NOTIMPL;    }    uint Native.IDocHostUIHandler.GetExternal(out object ppDispatch)    {        ppDispatch = Browser.ObjectForScripting;        return S_OK;    }    uint Native.IDocHostUIHandler.TranslateUrl(int dwTranslate, string strURLIn, out string pstrURLOut)    {        pstrURLOut = null;        return E_NOTIMPL;    }    uint Native.IDocHostUIHandler.FilterDataObject(IDataObject pDO, out IDataObject ppDORet)    {        ppDORet = null;        return E_NOTIMPL;    }    public static void SetSilent(WebBrowser browser, bool silent)    {        Native.IOleServiceProvider sp = browser.Document as Native.IOleServiceProvider;        if (sp != null)        {            Guid IID_IWebBrowserApp = new Guid("0002DF05-0000-0000-C000-000000000046");            Guid IID_IWebBrowser2 = new Guid("D30C1661-CDAF-11d0-8A3E-00C04FC9E26E");            object webBrowser;            sp.QueryService(ref IID_IWebBrowserApp, ref IID_IWebBrowser2, out webBrowser);            if (webBrowser != null)            {                webBrowser.GetType().InvokeMember("Silent", BindingFlags.Instance | BindingFlags.Public | BindingFlags.PutDispProperty, null, webBrowser, new object[] { silent });            }        }    }}internal static class Native{    [ComImport, Guid("BD3F23C0-D43E-11CF-893B-00AA00BDCE1A"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]    internal interface IDocHostUIHandler    {        [PreserveSig]        uint ShowContextMenu(int dwID, POINT pt, [MarshalAs(UnmanagedType.Interface)] object pcmdtReserved, [MarshalAs(UnmanagedType.Interface)] object pdispReserved);        [PreserveSig]        uint GetHostInfo(ref DOCHOSTUIINFO info);        [PreserveSig]        uint ShowUI(int dwID, [MarshalAs(UnmanagedType.Interface)] object activeObject, [MarshalAs(UnmanagedType.Interface)] object commandTarget, [MarshalAs(UnmanagedType.Interface)] object frame, [MarshalAs(UnmanagedType.Interface)] object doc);        [PreserveSig]        uint HideUI();        [PreserveSig]        uint UpdateUI();        [PreserveSig]        uint EnableModeless(bool fEnable);        [PreserveSig]        uint OnDocWindowActivate(bool fActivate);        [PreserveSig]        uint OnFrameWindowActivate(bool fActivate);        [PreserveSig]        uint ResizeBorder(COMRECT rect, [MarshalAs(UnmanagedType.Interface)] object doc, bool fFrameWindow);        [PreserveSig]        uint TranslateAccelerator(ref System.Windows.Forms.Message msg, ref Guid group, int nCmdID);        [PreserveSig]        uint GetOptionKeyPath([Out, MarshalAs(UnmanagedType.LPArray)] string[] pbstrKey, int dw);        [PreserveSig]        uint GetDropTarget([In, MarshalAs(UnmanagedType.Interface)] object pDropTarget, [MarshalAs(UnmanagedType.Interface)] out object ppDropTarget);        [PreserveSig]        uint GetExternal([MarshalAs(UnmanagedType.IDispatch)] out object ppDispatch);        [PreserveSig]        uint TranslateUrl(int dwTranslate, [MarshalAs(UnmanagedType.LPWStr)] string strURLIn, [MarshalAs(UnmanagedType.LPWStr)] out string pstrURLOut);        [PreserveSig]        uint FilterDataObject(IDataObject pDO, out IDataObject ppDORet);    }    [StructLayout(LayoutKind.Sequential)]    internal struct DOCHOSTUIINFO    {        public int cbSize;        public int dwFlags;        public int dwDoubleClick;        public IntPtr dwReserved1;        public IntPtr dwReserved2;    }    [StructLayout(LayoutKind.Sequential)]    internal struct COMRECT    {        public int left;        public int top;        public int right;        public int bottom;    }    [StructLayout(LayoutKind.Sequential)]    internal class POINT    {        public int x;        public int y;    }    [ComImport, Guid("3050F3F0-98B5-11CF-BB82-00AA00BDCE0B"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]    internal interface ICustomDoc    {        [PreserveSig]        int SetUIHandler(IDocHostUIHandler pUIHandler);    }    [ComImport, Guid("6D5140C1-7436-11CE-8034-00AA006009FA"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]    internal interface IOleServiceProvider    {        [PreserveSig]        uint QueryService([In] ref Guid guidService, [In] ref Guid riid, [MarshalAs(UnmanagedType.IDispatch)] out object ppvObject);    }}[Flags]public enum HostUIFlags{    DIALOG = 0x00000001,    DISABLE_HELP_MENU = 0x00000002,    NO3DBORDER = 0x00000004,    SCROLL_NO = 0x00000008,    DISABLE_SCRIPT_INACTIVE = 0x00000010,    OPENNEWWIN = 0x00000020,    DISABLE_OFFSCREEN = 0x00000040,    FLAT_SCROLLBAR = 0x00000080,    DIV_BLOCKDEFAULT = 0x00000100,    ACTIVATE_CLIENTHIT_ONLY = 0x00000200,    OVERRIDEBEHAVIORFACTORY = 0x00000400,    CODEPAGELINKEDFONTS = 0x00000800,    URL_ENCODING_DISABLE_UTF8 = 0x00001000,    URL_ENCODING_ENABLE_UTF8 = 0x00002000,    ENABLE_FORMS_AUTOCOMPLETE = 0x00004000,    ENABLE_INPLACE_NAVIGATION = 0x00010000,    IME_ENABLE_RECONVERSION = 0x00020000,    THEME = 0x00040000,    NOTHEME = 0x00080000,    NOPICS = 0x00100000,    NO3DOUTERBORDER = 0x00200000,    DISABLE_EDIT_NS_FIXUP = 0x00400000,    LOCAL_MACHINE_ACCESS_CHECK = 0x00800000,    DISABLE_UNTRUSTEDPROTOCOL = 0x01000000,    HOST_NAVIGATES = 0x02000000,    ENABLE_REDIRECT_NOTIFICATION = 0x04000000,    USE_WINDOWLESS_SELECTCONTROL = 0x08000000,    USE_WINDOWED_SELECTCONTROL = 0x10000000,    ENABLE_ACTIVEX_INACTIVATE_MODE = 0x20000000,    DPI_AWARE = 0x40000000}

Reference mshtml

using mshtml;

Then you can do this by accessing the document:

MainBrowser.Navigate("https://www.domain.com"); MainBrowser.LoadCompleted += (o, args) => {    var doc = (HTMLDocumentEvents2_Event) MainBrowser.Document;    doc.oncontextmenu += obj => false; };

From the internal WebBrowserSite class:

int UnsafeNativeMethods.IDocHostUIHandler.ShowContextMenu(int dwID, NativeMethods.POINT pt, object pcmdtReserved, object pdispReserved){    // Returning S_FALSE will allow the native control to do default processing,    // i.e., execute the shortcut key. Returning S_OK will cancel the context menu    return NativeMethods.S_FALSE;}

Hard-baked, you cannot override this. Putting the Winforms WebBrower inside a WindowsFormsHost would be a workaround, it's got a smarter implementation of this method that uses the IsWebBrowserContextMenuEnabled property and allows you to create your own context menu.