Suppress context menu in AxWebBrowser object -- timing issue?

Question

I am using an EventHandler to suppress a context menu on an AxWebBrowser. I am using the code below:

public class HtmlEditor : System.Windows.Forms.UserControl
{
    ...
    ...
    private AxSHDocVw.AxWebBrowser axWebBrowser1;
    ...
    ...
    public HtmlEditor()
    {
        InitializeComponent();
        axWebBrowser1.DocumentComplete +=new AxSHDocVw.DWebBrowserEvents2_DocumentCompleteEventHandler(axWebBrowser1_DocumentComplete);
        axWebBrowser1.Navigate("about:blank");
        axWebBrowser1.BeforeNavigate2 +=new AxSHDocVw.DWebBrowserEvents2_BeforeNavigate2EventHandler(axWebBrowser1_BeforeNavigate2);
        mshtml.HTMLDocumentClass doc = (mshtml.HTMLDocumentClass)this.axWebBrowser1.Document;///stop here
        doc.designMode = "On";  // This turns the control into an editor ///stop here
        ((mshtml.HTMLDocumentEvents2_Event)this.axWebBrowser1.Document).oncontextmenu += new mshtml.HTMLDocumentEvents2_oncontextmenuEventHandler(HtmlEditor_oncontextmenu); //suppress context menu ///stop here
        Dirty = false;///stop here
    }

    private bool HtmlEditor_oncontextmenu(mshtml.IHTMLEventObj e)
    {
        return false;
    }
    ...
    ...
}

There are four lines with the comment "///stop here". If I set a breakpoint at any one of those lines, run the app, then continue after I stop at that line, then the context menu does not appear when I right-click the control. However, if I put a breakpoint anywhere else and do the same, the context menu appears. Additionally, if I run the app with no breakpoints, the context menu appears.

I have also tried to assign the EventHandler in a separate method, called long after everything above is done executing, but again, the context menu appears.

Anyone have an idea how I can figure out my problem?

Answer 1

You should use the WinForms WebBrowser control and set its IsWebBrowserContextMenuEnabled property to false.

You can use its Document.DomDocument to get the raw MSHTML HTMLDocument object.