Can't get OLE interface
in [MFC]
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From: Nemo on 16 Apr 2008 19:26 Hi. I am trying to insert an image into a RichEditCtrl, and was following the code provided at MSDN KB 220844. I seem to be getting stuck right at the first step. The assert following the SendMessage always fails : ::SendMessage(m_ctlRichText.m_hWnd, EM_GETOLEINTERFACE, 0, (LPARAM)&m_pRichEditOle); ASSERT(m_pRichEditOle != NULL); I tried to look up on MSDN, but I can't seem to find any documentation as to why the attempt to get the interface might fail. Yet. I have a funny feeling it is some initialization call that I must be missing. btw, I do call AfxInitRichEdit(). I even stuck in a AfxOleInit() to be sure. I even tried using the GetIRichEditOle() method. But the same result - I got back a null pointer. Any insight, I'm sure, would be handy. Thanks,
From: Joseph M. Newcomer on 20 Apr 2008 18:08 At what point are you calling this? Are you sure the m_ctlRichText.m_hWnd is a valid window handle? Otherwise it looks like it should work, given the article. Otherwise, I'm as stuck as you are. joe On Wed, 16 Apr 2008 16:26:37 -0700 (PDT), Nemo <nnimod(a)gmail.com> wrote: >Hi. I am trying to insert an image into a RichEditCtrl, and was >following the code provided at MSDN KB 220844. >I seem to be getting stuck right at the first step. The assert >following the SendMessage always fails : > > ::SendMessage(m_ctlRichText.m_hWnd, EM_GETOLEINTERFACE, 0, >(LPARAM)&m_pRichEditOle); > ASSERT(m_pRichEditOle != NULL); > >I tried to look up on MSDN, but I can't seem to find any documentation >as to why the attempt to get the interface might fail. Yet. I have a >funny feeling it is some initialization call that I must be missing. > >btw, I do call AfxInitRichEdit(). I even stuck in a AfxOleInit() to be >sure. > >I even tried using the GetIRichEditOle() method. But the same result - >I got back a null pointer. > >Any insight, I'm sure, would be handy. > >Thanks, Joseph M. Newcomer [MVP] email: newcomer(a)flounder.com Web: http://www.flounder.com MVP Tips: http://www.flounder.com/mvp_tips.htm
From: Nemo on 21 Apr 2008 13:01 I call the SendMessage in OnInitDialog. After I read your reply, just to be sure I stuck in an ASSERT(::IsWindow(m_ctlRichText.m_hWnd)). No problems there. I'm a bit puzzled as to why I am not able to find any other instance (atleast on the net) of someone running into this problem. Is there any other way of inserting images into an edit control? Thanks for thinking about my problem Joe. Appreciate it. On Apr 20, 6:08 pm, Joseph M. Newcomer <newco...(a)flounder.com> wrote: > At what point are you calling this? Are you sure the m_ctlRichText.m_hWnd is a valid > window handle? Otherwise it looks like it should work, given the article. > > Otherwise, I'm as stuck as you are. > joe > > > > On Wed, 16 Apr 2008 16:26:37 -0700 (PDT), Nemo <nni...(a)gmail.com> wrote: > >Hi. I am trying to insert an image into a RichEditCtrl, and was > >following the code provided at MSDN KB 220844. > >I seem to be getting stuck right at the first step. The assert > >following the SendMessage always fails : > > > ::SendMessage(m_ctlRichText.m_hWnd, EM_GETOLEINTERFACE, 0, > >(LPARAM)&m_pRichEditOle); > > ASSERT(m_pRichEditOle != NULL); > > >I tried to look up on MSDN, but I can't seem to find any documentation > >as to why the attempt to get the interface might fail. Yet. I have a > >funny feeling it is some initialization call that I must be missing. > > >btw, I do call AfxInitRichEdit(). I even stuck in a AfxOleInit() to be > >sure. > > >I even tried using the GetIRichEditOle() method. But the same result - > >I got back a null pointer. > > >Any insight, I'm sure, would be handy. > > >Thanks, > > Joseph M. Newcomer [MVP] > email: newco...(a)flounder.com > Web:http://www.flounder.com > MVP Tips:http://www.flounder.com/mvp_tips.htm
From: Joseph M. Newcomer on 21 Apr 2008 13:39 My basic problem here is that I've never actually sent this message; the files I have that have pictures were created by WordPad, which inserted the pictures. However, you might consider looking at the WordPad source, to see how it does it. It's somewhere on the MSDN (I'm not sure it's THE WordPad source, but it is A WordPad source, and I've sometimes stepped through it with the debugger to help me understand other aspects of Rich Edit controls) joe On Mon, 21 Apr 2008 10:01:36 -0700 (PDT), Nemo <nnimod(a)gmail.com> wrote: >I call the SendMessage in OnInitDialog. After I read your reply, just >to be sure I stuck in an ASSERT(::IsWindow(m_ctlRichText.m_hWnd)). No >problems there. > >I'm a bit puzzled as to why I am not able to find any other instance >(atleast on the net) of someone running into this problem. Is there >any other way of inserting images into an edit control? > >Thanks for thinking about my problem Joe. Appreciate it. > > >On Apr 20, 6:08�pm, Joseph M. Newcomer <newco...(a)flounder.com> wrote: >> At what point are you calling this? �Are you sure the m_ctlRichText.m_hWnd is a valid >> window handle? �Otherwise it looks like it should work, given the article. � >> >> Otherwise, I'm as stuck as you are. >> � � � � � � � � � � � � � � � � joe >> >> >> >> On Wed, 16 Apr 2008 16:26:37 -0700 (PDT), Nemo <nni...(a)gmail.com> wrote: >> >Hi. I am trying to insert an image into a RichEditCtrl, and was >> >following the code provided at MSDN KB 220844. >> >I seem to be getting stuck right at the first step. The assert >> >following the SendMessage always fails : >> >> > � �::SendMessage(m_ctlRichText.m_hWnd, EM_GETOLEINTERFACE, 0, >> >(LPARAM)&m_pRichEditOle); >> > � � ASSERT(m_pRichEditOle != NULL); >> >> >I tried to look up on MSDN, but I can't seem to find any documentation >> >as to why the attempt to get the interface might fail. Yet. I have a >> >funny feeling it is some initialization call that I must be missing. >> >> >btw, I do call AfxInitRichEdit(). I even stuck in a AfxOleInit() to be >> >sure. >> >> >I even tried using the GetIRichEditOle() method. But the same result - >> >I got back a null pointer. >> >> >Any insight, I'm sure, would be handy. >> >> >Thanks, >> >> Joseph M. Newcomer [MVP] >> email: newco...(a)flounder.com >> Web:http://www.flounder.com >> MVP Tips:http://www.flounder.com/mvp_tips.htm Joseph M. Newcomer [MVP] email: newcomer(a)flounder.com Web: http://www.flounder.com MVP Tips: http://www.flounder.com/mvp_tips.htm
From: Ajay Kalra on 21 Apr 2008 14:21
I am curious as to why do you need this interface? -- Ajay On Apr 16, 7:26 pm, Nemo <nni...(a)gmail.com> wrote: > Hi. I am trying to insert an image into a RichEditCtrl, and was > following the code provided at MSDN KB 220844. > I seem to be getting stuck right at the first step. The assert > following the SendMessage always fails : > > ::SendMessage(m_ctlRichText.m_hWnd, EM_GETOLEINTERFACE, 0, > (LPARAM)&m_pRichEditOle); > ASSERT(m_pRichEditOle != NULL); > > I tried to look up on MSDN, but I can't seem to find any documentation > as to why the attempt to get the interface might fail. Yet. I have a > funny feeling it is some initialization call that I must be missing. > > btw, I do call AfxInitRichEdit(). I even stuck in a AfxOleInit() to be > sure. > > I even tried using the GetIRichEditOle() method. But the same result - > I got back a null pointer. > > Any insight, I'm sure, would be handy. > > Thanks, |