[VB.NET]WebBrowser Object Help

[brackett]

The exception indicates that either WebBrowser1 or WebBrowser1.ActiveXInstance is null...I'm not sure which one, though. If you put a breakpoint on that line and debug, you can use the immediate window to run the following 2 commands:

?WebBrowser1
?WebBrowser1.ActiveXInstance

One of those should be null (or Nothing). Alternatively, I suppose you could just add an assert:

Public Sub New()
        InitializeComponent()
        ' Cast to WebBrowser, so that we can subscribe to the NewWindow3 event
        Debug.Assert(WebBrowser1 IsNot Nothing)
        Debug.Assert(WebBrowser1.ActiveXInstance IsNot Nothing)
        AddHandler DirectCast(WebBrowser1.ActiveXInstance, SHDocVw.WebBrowser).NewWindow3, AddressOf WebBrowser1_NewWindow3
End Sub

What I meant by default URL is to set the Url property of WebBrowser1 to something in the Designer's PropertyPane. That'll give it a Url in the InitializeComponent() method, which is how I did it.

[CheeseBurgerMan]

Thank you very much for the help. Everything is at least mostly working now.

I have one more little question, then I'll be out of your hair (for a little while at least ) How do I set a wildcard for a URL? For example, in the following code

' WebBrowser1.Url Is "http://www.writely.com/" Then
        WebBrowser1.Navigate(bstrUrl)
        Else : System.Diagnostics.Process.Start(bstrUrl)
        End If

How would I get it so that http://writely.com/* opens the URL in WebBrowser1, while everything else still opens in the default browser?

[brackett]

You could use a RegEx for that - but for your particular scenario, you could just do:

   If Not String.IsNullOrEmpty(bstrUrl) AndAlso bstrUrl.IndexOf("writeley.com") >= 0 Then
       ' String contains writeley.com
   Else
       ' String does not contain writeley.com
   End If