NewWindow3 Event Not Fired

Question

I'm trying to use the NewWindow3 event with the Microsoft Web Browser control so that I can capture the URL and prevent it from opening Internet Explorer. NewWindow2 fires fine, but NewWindow3 does not. The only relevent thing I can find is NewWindow3 event on extended WebBrowser, but I don't want to use a custom control. I want to use the stock control. What can I do to get the NewWindow3 event to work without using a custom control?

private void Form1_Load( object sender, EventArgs e )
{
    webBrowser1.Navigate("http://www.stackoverflow.com");
    SHDocVw.WebBrowser browser = (SHDocVw.WebBrowser)webBrowser1.ActiveXInstance;
    Debug.Assert(browser != null);
    browser.NewWindow2 += new SHDocVw.DWebBrowserEvents2_NewWindow2EventHandler(browser_NewWindow2);
    browser.NewWindow3 += new SHDocVw.DWebBrowserEvents2_NewWindow3EventHandler(browser_NewWindow3);
}

void browser_NewWindow2( ref object ppDisp, ref bool Cancel )
{
    Debug.Write("NewWindow2");
}

private void browser_NewWindow3( ref object ppDisp, ref bool Cancel, uint dwFlags, string bstrUrlContext, string bstrUrl )
{
    Debug.Write(bstrUrl);
}

What happens if you subscribe to the events before you call `Navigate()`? What happens if you _only_ subscribe to `NewWindow3`? — Peter Duniho, May 03 '15 at 05:06
@PeterDuniho, `webBrowser1.ActiveXInstance` returns null and I cannot subscribe to the event. — Drew Chapin, May 03 '15 at 12:39
@HansPassant. [https://youtu.be/D9wcGMLogaA](https://youtu.be/D9wcGMLogaA) — Drew Chapin, May 03 '15 at 13:52

score 2 · Answer 1 · answered May 03 '15 at 14:12

After weeks of trying to figure this out, I finally figured it out. Rather than using the .Net wrapper of the Web Browser control, I added the Web Browser Control as an ActiveX COM control by doing the following:

Right click on any control in the Toolbox, and select Choose Items...
Go to COM Components tab and select Microsoft Web Browser
From the All Windows Forms category of the Toolbox, add a Microsoft Web Browser control to the form.
The NewWindow3 event is exposed normally. No need to use webBrowser1.AxtiveXControl to get to it.

Add code for NewWindow3 event

private void axWebBrowser1_NewWindow3( object sender, AxSHDocVw.DWebBrowserEvents2_NewWindow3Event e )
{
    Debug.WriteLine(e.bstrUrl);
    e.cancel = true;
}

You still can use the .NET `WeBrowser` control like [this](http://stackoverflow.com/a/20902928/1768303). — noseratio, May 05 '15 at 09:07
@Noseratio, Thanks, but that seems rather over complicated compared to just using the native COM control. — Drew Chapin, May 05 '15 at 12:38

score 1 · Answer 2 · answered Feb 23 '16 at 22:48

    // Form_Load
this.axWebBrowser1.NewWindow3 += new AxSHDocVw.DWebBrowserEvents2_NewWindow3EventHandler(this.axWebBrowser1_NewWindow3);
this.axWebBrowser1.NewWindow2 += new AxSHDocVw.DWebBrowserEvents2_NewWindow2EventHandler(this.axWebBrowser1_NewWindow2);

object obj = null; 


private void axWebBrowser1_NewWindow2(object sender, AxSHDocVw.DWebBrowserEvents2_NewWindow2Event e)
{
      e.cancel = true;
}

private void axWebBrowser1_NewWindow3(object sender, AxSHDocVw.DWebBrowserEvents2_NewWindow3Event e)
{
      //MessageBox.Show(e.bstrUrl);
      Form1 nF = new Form1();
      nF.axWebBrowser1.RegisterAsBrowser = true;
      e.ppDisp = nF.axWebBrowser1.Application;
      nF.Visible = true;
      nF.axWebBrowser1.Navigate(e.bstrUrl, ref obj, ref obj, ref obj, ref obj);
      e.cancel = true;
}

score 0 · Answer 3 · answered Apr 20 '18 at 01:59

0

As explained in this post, try to set the properties Embed Interop Type of the reference SHDocVw to false.

answered Apr 20 '18 at 01:59

Lucius

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NewWindow3 Event Not Fired

3 Answers3