I just copy/pasted your code in my BHO and got a non-zero length collection.
Try that URL: http://linuxfr.org/ Use random user/password values and try to connect. That will trigger a DISPID_BEFORENAVIGATE2
and you will get 3 forms.
So, it seems there is no form in the page your are navigating away.
Also, your code leaks memory and is not quite correct in using COM interfaces (ag: you should QueryInterface
for obtaining an IWebBrowser2
from a IDispatch
.
Rewritten:
CComPtr<IDispatch> spIDispatch( pDispParams->rgvarg[6].pdispVal );
CComPtr<IWebBrowser2> spIWebBrowser2;
HRESULT hr = spIDispatch.QueryInterface<IWebBrowser2>( &spIWebBrowser2 );
if ( SUCCEEDED( hr ) && spIWebBrowser2 ) {
CComPtr<IDispatch> spIDispatchDoc;
hr = spIWebBrowser2->get_Document( &spIDispatchDoc );
if ( SUCCEEDED( hr ) && spIDispatchDoc ) {
CComPtr<IHTMLDocument2> spIHTMLDocument2;
hr = spIDispatchDoc.QueryInterface<IHTMLDocument2>( &spIHTMLDocument2 );
if ( SUCCEEDED( hr ) && spIHTMLDocument2 ) {
CComPtr<IHTMLElementCollection> spIHTMLElementCollection;
hr = spIHTMLDocument2->get_forms( &spIHTMLElementCollection );
if ( SUCCEEDED( hr ) && spIHTMLElementCollection ) {
[...]
}
}
}
}