BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Get an IWebBrowser2 from TActiveForm          BorlandTalk.com Forum Index -> C++ Builder (ActiveX) View previous topic :: View next topic   Author Message Stefan Beetonshu Guest Posted: Thu Apr 08, 2004 1:00 pm    Post subject: Get an IWebBrowser2 from TActiveForm Although i'm pretty new to ActiveX and BCB6, i managed to write a simple Object, that shows my controls on an TActiveForm within my Internet Explorer. Now i tried to get the URL from the referring page. I found that IWebBrowser2 has a LocationURL function, which returns the current URL, but i didn't manage to get it. I tried to get IWebBrowser2 object by walking through the objects ( IUnknown -> IOleObject -> IOleClientSite -> IServiceProvider -> IWebBrowserApp -> IWebBrowser2 hr = QueryInterface(IID_IUnknown, (void**)&pUnknown); if (S_OK == hr) { hr = pUnknown->QueryInterface(IID_IOleObject, (void**)&pOObj); if (S_OK == hr) .... But even the first QueryInterface returns a null value. I really do not know where to start. What's wrong whith my code? During my search, i saw that delphi has a ActiveFormControl property with a valid ClientSite property. I could't find anything like that in BCB6. Why is this missing? Thank you very much for your help! Stefan Back to top Alex Bakaev [TeamB] Guest Posted: Thu Apr 08, 2004 5:37 pm    Post subject: Re: Get an IWebBrowser2 from TActiveForm Stefan Beetonshu wrote: Quote: Although i'm pretty new to ActiveX and BCB6, i managed to write a simple [snip] I suggest searching this group (google's advanced groups search should do)- IIRC, this question was answered in the past. hth, ..a Back to top Stefan Beetonshu Guest Posted: Tue Apr 13, 2004 7:22 am    Post subject: Re: Get an IWebBrowser2 from TActiveForm Alex Bakaev [TeamB] wrote: Quote: I suggest searching this group (google's advanced groups search should do)- IIRC, this question was answered in the past. I've already searched the newsgroups and i searched it again. The only result for "TActiveForm" and "IWebBrowser2" is refering to my post. Maybe you can give me a point where to start? Please. Back to top Alex Bakaev [TeamB] Guest Posted: Tue Apr 13, 2004 5:21 pm    Post subject: Re: Get an IWebBrowser2 from TActiveForm Stefan Beetonshu wrote: Quote: Alex Bakaev [TeamB] wrote: I suggest searching this group (google's advanced groups search should do)- IIRC, this question was answered in the past. I've already searched the newsgroups and i searched it again. The only result for "TActiveForm" and "IWebBrowser2" is refering to my post. Maybe you can give me a point where to start? Please. http://tinyurl.com/2rvdx hth, ..a Back to top Stefan Beetonshu Guest Posted: Mon Apr 19, 2004 3:40 pm    Post subject: Re: Get an IWebBrowser2 from TActiveForm Alex Bakaev [TeamB] wrote: Quote: I suggest searching this group (google's advanced groups search should do)- IIRC, this question was answered in the past. No. This has been discussed for Delphi quite a lot, but i think there's a problem with C++ Builder. I've searched the web again and again, but i could't find any example for my problem. Quote: I've already searched the newsgroups and i searched it again. The only result for "TActiveForm" and "IWebBrowser2" is refering to my post. Maybe you can give me a point where to start? Please. http://tinyurl.com/2rvdx That example doesn't help. The problem is to receive a proper IOleObject from a TActiveForm. Trying to get it via ComObject property of TActiveForm will result in a "TMyActiveForm has not been registered as a COM class" error. This seems to work for Borland Delphi, but not for C++ Builder. There is already a question in the newsgroup since Jan 2000 (see "http://groups.google.de/groups?selm=86q58e%24n0l%241%40nntp1.atl.mindspring.net&oe=UTF-8"), but there has been no answer to this question yet. Maybe i've just asked the wrong question so here i go again ;) How can i get a valid IOleObject within a function of a TActiveForm created by Borland C++ 6 Wizard? And - yes - i have already searched the newsgroups and google for information about that! Stefan Back to top Alex Bakaev [TeamB] Guest Posted: Mon Apr 19, 2004 6:49 pm    Post subject: Re: Get an IWebBrowser2 from TActiveForm Stefan Beetonshu wrote: Quote: http://tinyurl.com/2rvdx That example doesn't help. The problem is to receive a proper IOleObject from a TActiveForm. Trying to get it via ComObject property of The subject of the post is "GetIWebBrowser2 from TActiveForm". The sample show how to do that. Quote: Maybe i've just asked the wrong question so here i go again Apparently. <g> Quote: How can i get a valid IOleObject within a function of a TActiveForm created by Borland C++ 6 Wizard? And - yes - i have already searched the newsgroups and google for information about that! I suggest you take a look at the atlvcl.h file, in particular the definition of VCLCONTROL_IMPL and then, of the TVclControlImpl; you will see that your active form derives from IOleObject. So your 'this' is IOleObject. hth, ..a Back to top Stefan Beetonshu Guest Posted: Tue Apr 20, 2004 9:45 am    Post subject: Re: Get an IWebBrowser2 from TActiveForm Alex Bakaev [TeamB] wrote: Quote: I suggest you take a look at the atlvcl.h file, in particular the definition of VCLCONTROL_IMPL and then, of the TVclControlImpl; you will see that your active form derives from IOleObject. So your 'this' is IOleObject. That wasn't the clue either. But i think i found out what went wrong... I tried to get an IOleObject within my VCL control (TMyActiveFormCtrl), but i can't reach the IOleObject from here. I have to get my IOleObject from my "Control Implementation" (TMyActiveFormCtrlImpl). This is indeed a descendant from IOleObject and so, "IOleObject* pMyOO = this" will succeed. Now i have to find a way to pass it to my VCL control, but i think i can manage that. Stefan Back to top Alex Bakaev [TeamB] Guest Posted: Tue Apr 27, 2004 12:21 am    Post subject: Re: Get an IWebBrowser2 from TActiveForm Stefan Beetonshu wrote: Quote: Alex Bakaev [TeamB] wrote: I suggest you take a look at the atlvcl.h file, in particular the definition of VCLCONTROL_IMPL and then, of the TVclControlImpl; you will see that your active form derives from IOleObject. So your 'this' is IOleObject. That wasn't the clue either. But i think i found out what went wrong... I agree. That wasn't the clue. It was a direct pointer. 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