createDocumentFromUrl usage in VB.NET

Hello All,
I need to use mshtml.HTMLDocument.createDocumentFromUrl in VB.NET to
load a webpage. The code looks like this

Imports mshtml
Public DocumentFactory As HTMLDocument

would be very grateful if you could let me know how to solve this
problem in VB.NET. I am getting the error "Object reference not set to
an instance of object" I am listing the code below that I am using.

Imports mshtml
Public DocumentFactory As HTMLDocument

Public Function GetWebPage(ByVal strURL As String) As HTMLDocument
Try
GetWebPage = DocumentFactory.createDocumentFromUrl(strURL,
vbNullString)
StatusBar1.Panels(1).Text = strURL
Do Until GetWebPage.readyState = "complete"
Application.DoEvents()
Loop
Catch ex As Exception
MsgBox(ex.Message)
End Try
End Function

On further reading I found that as HTMLDocument is just an interface so
I need to cast it as IPersistStreamInit. Therefater I have got stuck as
I donot know how this needs to be done. Some of the sites I went
through, gave this implementation

Imports System.Runtime.InteropServices

and in the Function GetWebPage(...)... add

Dim ips As IPersistStreamInit

But .NET does not recognize IPersistStreamInit

What to do???

I will be grateful if somebody gives a solution to this problem.
Any help would be greatly appreciated.

Hi Vibhu

I think we get the picture :-)

Have a look at the answer to your earlier post.

Charles


"Vibhu" <vibhubansal@gmail.com> wrote in message
news:1106822236.195136.23820@z14g2000cwz.googlegroups.com...
> Hello All,
> I need to use mshtml.HTMLDocument.createDocumentFromUrl in VB.NET to
> load a webpage. The code looks like this
>
> Imports mshtml
> Public DocumentFactory As HTMLDocument
>
> would be very grateful if you could let me know how to solve this
> problem in VB.NET. I am getting the error "Object reference not set to
> an instance of object" I am listing the code below that I am using.
>
> Imports mshtml
> Public DocumentFactory As HTMLDocument
>
> Public Function GetWebPage(ByVal strURL As String) As HTMLDocument
> Try
> GetWebPage = DocumentFactory.createDocumentFromUrl(strURL,
> vbNullString)
> StatusBar1.Panels(1).Text = strURL
> Do Until GetWebPage.readyState = "complete"
> Application.DoEvents()
> Loop
> Catch ex As Exception
> MsgBox(ex.Message)
> End Try
> End Function
>
> On further reading I found that as HTMLDocument is just an interface so
> I need to cast it as IPersistStreamInit. Therefater I have got stuck as
> I donot know how this needs to be done. Some of the sites I went
> through, gave this implementation
>
> Imports System.Runtime.InteropServices
>
> and in the Function GetWebPage(...)... add
>
> Dim ips As IPersistStreamInit
>
> But .NET does not recognize IPersistStreamInit
>
> What to do???
>
> I will be grateful if somebody gives a solution to this problem.
> Any help would be greatly appreciated.
>