shdocvw.dll - WebBrowser control

[Force Code]

Trying to create and access a WebBrowser control behind the scenes in a win32 console app:

::CoInitialize(NULL);

SHDocVw::IWebBrowser2Ptr brwsr = NULL;
HRESULT hResult;

hResult = brwsr.CreateInstance(__uuidof(SHDocVw::WebBrowser));

//hResult = CoCreateInstance(_uuidof(SHDocVw::WebBrowser), NULL,
// CLSCTX_SERVER, __uuidof(IWebBrowser2), (LPVOID*)&brwsr);

I can then call brwsr->get_Name, brwsr->get_FullName etc. with no problem. brwsr->Navigate(...) is causing a runtime crash (with CoCreateInstance or CreateInstance.) Here's the current method I'm using:

BSTR oURL;
oURL = SysAllocString(L"http://www.google.com");
VARIANT var;
var.vt = VT_EMPTY;
brwsr->Navigate((BSTR)oURL, &var, &var,
&var,&var);
SysFreeString(oURL);

(which I copied and pasted from somewhere). Have no idea if anybody still uses COM, but does someone know what I'm doing wrong.

[CPallini]

Force Code wrote:

Have no idea if anybody still uses COM, but does someone know what I'm doing wrong.

Nope. Nobody uses COM nowdays. But a long time ago (I was just a child), a wise COM guru told me: "Check always HRESULTs, my son!" :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
[my articles]

[Force Code]

The fact that its crashing on the brwsr->Navigate call sort of rules out checking the return value. What would you be using to access the web in a trivial win32 console app.

[Lim Bio Liong]

Hello Force Code, I'm not familiar with the IWebBrowser2 interface but after looking up the documentation for Navigate(), my gut feel is that the 2nd to the 5th parameters should be filled with VARIANT parameters that actually contain some information (rather than just being VT_EMPTY). Passing "NULL" might even be a better choice (I really don't know). My suggestion is to look up the documentation for Navigate() for proper guidance and then pass in appropriate values for the 2nd to 5th parameters. - Bio.

[CPallini]

OK, but why do you call the method without filling parameters with meaningful values? I read a bit the documentation and it seems you cannot simply supply empty variants. :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
[my articles]