C / C++ / MFC

Re: Trying to use IStream to pass data to an ATL Server

21-Feb-02 3:49

Hi,

Well the error message is quite dissapointing...

0x8000ffff E_UNEXPECTED

Dr. Grimes didn´t answer me, but well, I keep on researching, and it seems that you have to encapsulate the metafile in a PictureBox control ( IPicture), and the destination is not in the same DLL so I need to save the object in one stream ( I use for that IStream), and then in the ATL server I take that string and try to load the pic...

But... I when I´m going to read from the stream it doesn´t... Dead | X|

I know this is a quite common issue, just to pass a metafile from one process to another using COM, it´s one of the basic thing from COM, the sad thing is that anybody that knows the answer wants to give a hint.... Frown | :-(

Thanks for you interest mazdak, Bye !
Braulio

Mazdak21-Feb-02 4:22

Mazdak

21-Feb-02 4:22

Hi:
Sorry,my ATL knowledge is not enough to help you. Frown | :(

It's very dissapointing that although there are lots of expert in CP but it seems
non of them (or few of them) have good ATL knowledge. Frown | :(

There are about 30000 members in this site... Dead | X|

Good luck and Bye

Mazy

"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975

Re: Trying to use IStream to pass data to an ATL Server

Braulio Dez21-Feb-02 7:25

Re: Trying to use IStream to pass data to an ATL Server

21-Feb-02 7:25

Hi Mazdak !

Finally I got the solution, Joao Vaz give me one URL to a nice article, and now it is working nice !!! ( there were some magic with the streams XDDD ).

I have to tidy up all the code and make a submission to codeproject. Bye !
Braulio

Braulio Dez13-Mar-02 2:41

Re: Trying to use IStream to pass data to an ATL Server

13-Mar-02 2:41

Hola !

As I promised you I Wrote the article about Streams and Pictures and ActiveX, you can check it out in:

http://www.codeproject.com/useritems/PictureTransfer.asp

The bad thing... something went wrong with the submission wizard and the Picture and the zip with the source is not there ( I sent one e-mail to chris with the files, let´s hope he fixes it).

Bye !
Braulio

Joao Vaz21-Feb-02 4:38

Re: Trying to use IStream to pass data to an ATL Server

21-Feb-02 4:38

Braulio, just one thought , you tried to create the stream on global memory
with the CreateStreamOnHGlobal and get the global handle from the server with
GetHGlobalFromStream , this without using Stg ?

Joao Vaz

Braulio Dez21-Feb-02 5:26

Re: Trying to use IStream to pass data to an ATL Server

21-Feb-02 5:26

Hi,

Thanks for the tip, I´m trying it now, but it gives me the same error, here it is the code that I use now:

MFC Client:

IStream *TempStream = NULL;

CreateStreamOnHGlobal (NULL, TRUE, &TempStream);

HGLOBAL hMem = NULL;
GetHGlobalFromStream(TempStream, &hMem);
LPVOID lpData = GlobalLock(hMem);

HRESULT HRes = IPict->SaveAsFile(TempStream, TRUE, 0);
GlobalUnlock(hMem);

m_GDIGr.SetMetafile(TempStream);

ATL Server:

STDMETHODIMP CGDIGraphics::SetMetafile(IStream *pStream)
{
   
   IPicture *Pict = NULL;        

   HGLOBAL hMem = NULL;
   GetHGlobalFromStream(pStream, &hMem);
   LPVOID lpData = GlobalLock(hMem);   
   HRESULT Res = ::OleLoadPicture(pStream, 0, FALSE, IID_IPicture,(void **) &Pict);
   GlobalUnlock(hMem);

I don´t know where I made the mess Frown | :-(

, ( I´m pasting the activeX in an automated Ms Word instance and from my app calling the method to insert the activex, all this should be easy-pc for Com isn´t it ? )

Thanks, Bye !
Braulio

Joao Vaz21-Feb-02 6:15

Re: Trying to use IStream to pass data to an ATL Server

21-Feb-02 6:15

Perhaps this article could help ?http://www.devx.com/premier/mgznarch/vbpj/1999/04apr99/vp0499.pdf

Cheers,

Joao Vaz

Braulio Dez21-Feb-02 7:18

Re: Trying to use IStream to pass data to an ATL Server

21-Feb-02 7:18

Hi Joao !

I had that article before, but well I read it again, and you were right !!!, there is the solution !!!, thanks a lot !

See you and obrigado !

Braulio

Joao Vaz21-Feb-02 7:42

Re: Trying to use IStream to pass data to an ATL Server

21-Feb-02 7:42

Cool

, now you can post a article on Code Project

Cheers,

Joao Vaz

Joaquín M López Muñoz21-Feb-02 6:19

Re: Trying to use IStream to pass data to an ATL Server

21-Feb-02 6:19

Hi Braulio, unfortunately seems like most of us in this forum are COM-impaired Cry | :((

but I'm following your investigations with great interest, and doing a little research myself. I've just sumbled upon these two functions:

<a href="http://msdn.microsoft.com/library/default.asp?url=/library/en-us/com/cmf_a2c_88tp.asp">CoMarshalInterThreadInterfaceInStream</a>

<a href="http://msdn.microsoft.com/library/default.asp?url=/library/en-us/com/cmf_a2c_1rjh.asp">CoGetInterfaceAndReleaseStream</a>

,
which seem to do the job of packing and unpacking an object with the aid of an IStream to pass things across threads. Maybe they're worth having a look at. Good luck.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Braulio Dez21-Feb-02 6:42

Re: Trying to use IStream to pass data to an ATL Server

21-Feb-02 6:42

Thanks for the tip !

MMm..., I don´t know too much about marshaling, but well it´s good time to start learning, I think I have to use maybe something like "CoMarshalInterface", because I have different process, I have:

MyApp -( Different Space Proccess)-> Word Automated Instance --> MyDll

I´m advancing but very slow, but now I can paste the ActiveX in a Word automated instance, modify it from my app, and even make serialize it !, the last step it´s to do something useful XD, like for example get the picture...

I swear that if I get all this things up and running I will write a mega article for codeguru talking about this stuff Big Grin | :-D

Thanks for the help Joaquin, Hasta luego !
Braulio

Joaquín M López Muñoz21-Feb-02 6:41

Re: Trying to use IStream to pass data to an ATL Server

21-Feb-02 6:41

I swear that if I get all this things up and running I will write a mega article for codeguru talking about this stuff

codeguru? Poke tongue | ;-P

Suerte con la historia ésta, seguro que cuando acabes tendrás mogollón de información para un buen artículo.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Braulio Dez21-Feb-02 7:17

Re: Trying to use IStream to pass data to an ATL Server

21-Feb-02 7:17

HOOLA !!!

Ooops, sh*t not codeguru... CODEPROJECT OF COURSE Smile | :)

I GOT IT !!!!, It is working now, thanks to the article ( "Using Picture Objects in ATL", from VBPJ, page 102, wow it´s not so easy to make work the streams and streams persists).

Ahora tengo que ajustarlo para que no pierda memoria ni recursos, y en cuanto lo tenga voy a hacer un pedaaasssoo de artículo... XDDDD

Hasta luego, y gracias por los ánimos !
Braulio

Joaquín M López Muñoz21-Feb-02 7:38

Re: Trying to use IStream to pass data to an ATL Server

21-Feb-02 7:38

enhorabuena chaval Smile | :)

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Mazdak21-Feb-02 7:26

Mazdak

21-Feb-02 7:26

Congratulation!

I'm waiting for that article ,come on Braulio,but I want it here in COPDEPROJECT not codeguru.
Big Grin | :-D

Mazy

"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975

Re: Trying to use IStream to pass data to an ATL Server

Joao Vaz21-Feb-02 6:50

Re: Trying to use IStream to pass data to an ATL Server

21-Feb-02 6:50

Joaquín , these two functions doesn't work outside processes neither the preferred way of IGlobalInterfaceTable::RegisterInterfaceInGlobal.
He's doing the right thing, i must be a minimal error, that can't spot, i used to program in COM an ATL, but i don't touch it for about one year, and man, we can forget a lot of things that was trivial in past
Eek! | :eek:

Regards, Joaquín and continue your good work here at VC++ forum helping the guys . You and James T. Johnson (on the C#) are the most active guys, of course not counting Nish too Big Grin | :-D

Joao Vaz

Braulio Dez13-Mar-02 2:41

Re: Trying to use IStream to pass data to an ATL Server

13-Mar-02 2:41

Braulio Dez13-Mar-02 2:40

Find y coord of a BezierSpline

13-Mar-02 2:40

21-Feb-02 2:49

Hello,

I use the function PolyBezier(), so I have a curve composed of "n" Bezier Curves , but I don't know how to get the y coordinate of my curve giving the x coordinate. Is there a solution ?

Thanks

Re: Find y coord of a BezierSpline

Joaquín M López Muñoz21-Feb-02 3:19

Doc/View - Setting The Window Title

21-Feb-02 3:19

The curve is made up of connecting Bezier segments, each depending on two end points P₀ and P₃ and two so-called control points P₁ and P₂. Points in the segment are given by

x(k) = (1-k)³x₀ + 3k(1-k)²x₁ + 3k²(1-k)x₂ + k³x₃,
y(k) = (1-k)³y₀ + 3k(1-k)²y₁ + 3k²(1-k)y₂ + k³y₃,

where k ranges between 0 and 1.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

AJ12321-Feb-02 2:25

AJ123

21-Feb-02 2:25

Hi,

Can anyone tell me how to set the title of the main window in a SDI Doc/View Architecture app. Do i can totally replace 'untitled - Name Of App' ?

Regards
Richard

Re: Doc/View - Setting The Window Title

21-Feb-02 2:25

You can try to use CWnd::SetWindowText()

Hoope it help

Bye,
BogdanO

...the night is long ... but not long enought to do some real coding ...

Re: Doc/View - Setting The Window Title

Joaquín M López Muñoz21-Feb-02 2:29