Need help with NewWindow3 and IWebBrowse2

Paul Groetzner

This is what I see in the debugger (Autos tab): url tree -> Name: url Value: {...} Type: ATL::CStringT > > Name: ATL::CSimpleStringT Value: "*edited value* http://myinternallink" Type: ATL::CSimpleStringT Name: m_pszData Value: 0x6aed22a7 Type: char * Name: Value: CXX0030: Error: expression cannot be evaluated

David Crow

None of the vnt stuff is necessary. Just use:

CString url(V_BSTR(&URL));
AfxMessageBox(url);

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Paul Groetzner

That didn't work. The compiler didn't like it one bit :( error C2227: left of '->bstrVal' must point to class/struct/union/generic type type is 'BSTR *'

David Crow

Show me your code once more. Did you try it with/out the ampersand?

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Paul Groetzner

Tried it with and without the ampersand. Pretty much the same error: with: error C2227: left of '->bstrVal' must point to class/struct/union/generic type type is 'BSTR *' without: error C2227: left of '->bstrVal' must point to class/struct/union/generic type type is 'BSTR' Here's my code: ON_EVENT(CLoadWebSite, IDC_EXPLORER, 273 /* NewWindow3 */, OnNewWindow3Explorer1, VTS_DISPATCH VTS_PBOOL VTS_BSTR VTS_BSTR VTS_BSTR) void CLoadWebSite::OnNewWindow3Explorer1(LPDISPATCH FAR* ppDisp, BOOL FAR* Cancel, BSTR Flags, BSTR URLContext, BSTR URL) { CString url(V_BSTR(URL)); AfxMessageBox(url); *Cancel = TRUE; // Browser.Navigate(url,NULL,NULL,NULL,NULL); }

David Crow

I messed up (again). :-O Since URL is already a BSTR, as opposed to a VARIANT, it obviously cannot be run through the V_BSTR() macro.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Paul Groetzner

I've tried converting the value to CString every which way and it always comes to the same results no matter what, a line of several dozen ? marks. This is getting quite frustrating :(( I have to assume then that it may be a problem with BSTR URL not reporting a proper url. To test the NewWindow3 function I had my default site go to google.com, I searched on a something irrelevant and right-clicked to Open to a new window to trigger the event. In the debugger URL always comes back as a bunch of square shapes (I think because debugger can't display BSTR?, at least there's a doc somewhere on codeproject that said it couldn't, but it might have been for an older version of VS) and converting always results in ? marks... If you want to test this you can do do very easily by going to this link: http://www.codeproject.com/com/webbrowser.asp[^] This is basically something similar to what I have. Just edit the code, change the default site if you wish and add the event for the NewWindow3 compile and have at it to see what you can find...

David Crow

univega_r304 wrote:

I think because debugger can't display BSTR

It might indeed be a Unicode thing. This is the default for VS2003 and VS2005, but not so with VS6 (what I'm using). In the Watch window, the symbol for strings is s while the symbol for Unicode strings is su. See here for more.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Paul Groetzner

Yeah, I'm using VS2005... Here's a new bit a code that came very close... void CLoadWebSite::OnNewWindow3Explorer1(LPDISPATCH FAR* ppDisp, BOOL FAR* Cancel, BSTR Flags, BSTR URLContext, BSTR URL) { BSTR b = URL; _bstr_t orig(b); CString cstring((char *)orig); AfxMessageBox(_T(cstring)); *Cancel = TRUE; Browser.Navigate(cstring,NULL,NULL,NULL,NULL); } When I debug this code the value for cstring is the URL I need! However, when I try to view it with AfxMessageBox or Navigate to it, it still thinks the value is all question marks.... I don't understand why it could show me one thing and do another... I wish there was a way to post a screenshot.... Any ideas?

David Crow

univega_r304 wrote:

AfxMessageBox(_T(cstring));

The _T() macro is for string literals.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

David Crow

univega_r304 wrote:

If you want to test this you can do do very easily by going to this link: http://www.codeproject.com/com/webbrowser.asp\[^\] This is basically something similar to what I have. Just edit the code, change the default site if you wish and add the event for the NewWindow3 compile and have at it to see what you can find...

I already had an application that uses this control, but for some reason it does not support the NewWindow3 event. What version of shdocvw.dll do you have? Mine is 6.0.2900.2937.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Paul Groetzner

Unless it's on mulitple locations on my drive the version I have appears to be older... I have 6.0.2900.2919. According to the article on MSDN: NewWindow3 is available only in Microsoft Windows XP Service Pack 2 (SP2) or later. So if you have that, it should work... FYI, after messing around a bit and not getting anywhere I put the code back that was showing me the proper URL in the debugger stopped working again. Same code, but bad results. I have't been able to get it to reproduce the proper URL in the debugger since.:mad:

Paul Groetzner

Would you believe I *FINALLY* got it working? Here's the code to make it work.... ON_EVENT(CLoadWebSite, IDC_EXPLORER, 273 /* NewWindow3 */, OnNewWindow3Explorer1, VTS_DISPATCH VTS_PBOOL VTS_BSTR VTS_BSTR VTS_BSTR) void CLoadWebSite::OnNewWindow3Explorer1(LPDISPATCH FAR* ppDisp, BOOL FAR* Cancel, BSTR Flags, BSTR URLContext, BSTR URL) { CString strURL; // capture URL of any link clicked that would attempt to open in a new window if (URL != NULL) strURL = (LPCTSTR)URL; *Cancel = TRUE; // prevent IE from spawning Browser.Navigate(strURL,NULL,NULL,NULL,NULL); // loads resulting URL into the web browser control instead of a spawned IE window }

David Crow

univega_r304 wrote:

strURL = (LPCTSTR)URL;

This makes sense since a BSTR is really a type of char*. Could you have also done:

strURL = URL;

as the assignment operator should handle the typecast automatically? If not, oh well.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb