Re: IWebBrowser2 ptr returns null, and thus is not able to call navigate ( Migrating from MFC,VC7 to vc9)

From:

Ana <didwin@gmail.com>

Newsgroups:

microsoft.public.vc.language

Date:

Fri, 19 Jun 2009 13:57:11 -0700 (PDT)

Message-ID:

<8f5227fc-2377-4a2c-bdd6-29dc67a1e9f7@l32g2000vba.googlegroups.com>

On Jun 19, 4:26 pm, Ana <did...@gmail.com> wrote:

On Jun 15, 11:08 am, Ana <did...@gmail.com> wrote:

On Jun 12, 5:29 pm, "Alex Blekhman" <tkfx.REM...@yahoo.com> wrote:

"Ana" wrote:

It compiles well but crashes on navigate call of webbrowser
interface. ( the pointer returned is NULL and I cannot really
proceed further.).
Please suggest if authomation selection in MFC application has
anything to do with initializing the Iwebbrowser*.

You don't need to do anything special for that. I have just
created dummy MFC dialog project with VS 2008 and dragged
WebBrowser on the main dialog. Then I added an edit box for an URL
text and one button [Go]. On button click I call Navigate method
of my CWebBrowserCtrl class (generated by the IDE when I added a
variable to main dialog class for WebBrowser control). Everything
works out of the box.

I suggest you to start new dummy project and do the same I just
did. Then you will be able to compare exiting code in your
application with IDE generated code.

HTH
Alex

Thanks Alex, I have already done that , that does not help ,as in the
code an Instance of IwebBrowser2* is used which is used in automation
contructor( Wrap the webbrowser in Automation).This is a code done
withVC6.
Though i understand I ll have to redo the code, but yet if there is
something that can resolve the issue
Any light will help.

Thanks,Ana- Hide quoted text -

- Show quoted text -

Hi,

The webbrowser control class Cwebbrowser is derived from CCmdtarget
and has htmlview type function definitions as members.
CWebBrowser2::CWebBrowser2()
{
        EnableAutomation();

        m_pBrowserApp = NULL;
        // To keep the application running as long as an OLE auto=

mation

// object is active, the constructor calls Afx=

OleLockApp.

AfxOleLockApp();

}

In the application Colecustomsite is used for custom webbrowser, this
part works fine but as sson webbrowser from the above constructor
comes into play, nullreference error pops in.
Please suggest, where the Iwebbrowser* pBrowserApp will fetch the
correct interface pointer.

Thanks,
Ana- Hide quoted text -

- Show quoted text -

Sorry for the botheration, it seesm to work now, there were some
overide functions which i change and things seem to work.

Thanks everybody for all support.

Thanks,
Ana