OLE Objects in Rich Edit control

[Dmitry Streblechenko (MVP)]

Does anybody have any experience with the EN_OBJECTPOSITIONS notification
message?
I am trying to load an RTF containing the "\objattph" placeholder into an
RTF control.
According to the docs, I need to
1. Send EM_SETEVENTMASK specifying at least ENM_OBJECTPOSITIONS bit to make
sure the control parent will receive the (WM_NOTIFY, EN_OBJECTPOSITIONS)
message
2. Send EM_SETOLECALLBACK passing my implementation of the
IRichEditOleCallback interface
3. Stream the data in using EM_STREAMIN and SF_RTF
4. During the streaming the control will send (WM_NOTIFY,
EN_OBJECTPOSITIONS) to the control parent once it encounters the "\objattph"
placeholder.

I do indeed receive the EN_OBJECTPOSITIONS notification and I return the #
of objects and a pointer to an array of ULONGs in the OBJECTPOSITIONS
structure pointed to by LParam.
Am I mistaken in believing that the RTF control will then use my
implementation of the IRichEditOleCallback interface set in #2 to get the
actual IStorage data? - Nothing really happens: I get no callbacks and the
loaded RTF has the "\objattph" tag replaced with "\par" rather than the
actual data that I am supposed to supply.

Any ideas? I am really puzzled...

Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool

[Henry Skoglund]

"Dmitry Streblechenko (MVP)" <dmi...@dimastr.com> wrote in message
news:%23$jNPzsHE...@TK2MSFTNGP11.phx.gbl...
...

> Am I mistaken in believing that the RTF control will then use my
> implementation of the IRichEditOleCallback interface set in #2 to get the
> actual IStorage data? - Nothing really happens: I get no callbacks and the
> loaded RTF has the "\objattph" tag replaced with "\par" rather than the
> actual data that I am supposed to supply.

While I have not tried your exact RTF flavor, I can tell you, though, that
the IRichEditOleCallback does call your code back. In our project we use
a lot of embedded "{\pict\wmetafile8\.." pictures in the RTFs, and for them
to be displayed properly when using EM_STREAMIN, I have to return
a freshly initialized IStorage pointer to the richedit control when it calls
the GetNewStorage() method. I just return E_NOTIMPL in the other
9 methods, except for QueryInsertObject(), where I return S_OK.

Rgrds Henry

[Dmitry Streblechenko (MVP)]

Hmmm... Do you handle (WM_NOTIFY, EN_OBJECTPOSITIONS) notifications in your
code?

Dmitry Streblechenko (MVP)
http://www.dimastr.com/
OutlookSpy - Outlook, CDO
and MAPI Developer Tool

"Henry Skoglund" <drt...@tungware.com> wrote in message
news:el8WMUCI...@tk2msftngp13.phx.gbl...