How to add a dual interface to a non-ATL, non-MFC Application [closed] - C / C++ / MFC Discussion Boards

Re: OT-Hey Warrior!

Iain Clarke, Warrior Programmer16-Nov-09 21:43

Iain Clarke, Warrior Programmer

16-Nov-09 21:43

Going great - see the change in my sig!

Iain.

I have now moved to Sweden for love (awwww).

Re: TIming

C^hris L^osinger16-Nov-09 7:09

C^hris L^osinger

16-Nov-09 7:09

QueryPerformanceCounter can give better resolution than GetTickCount or 'time()' or SetTimer. but you will never get a loop that takes exactly 1/30s in Windows - you can get close, on average. but not exactly, all the time. Windows just isn't that kind of OS.

image processing toolkits | batch image processing

Re: TIming

Jeff Archer16-Nov-09 17:11

Jeff Archer

16-Nov-09 17:11

Use the MultiMedia timer with a callback function. It is the most accurate timing you can have in Windows.
Lookup the following in the VC++ help:

TIMECAPS
timeGetDevCaps
timeBeginPeriod
timeSetEvent

Re: TIming

Anthony Appleyard16-Nov-09 23:34

Anthony Appleyard

16-Nov-09 23:34

This "event setting" sounds complicated, like trapping errors. My program uses this method, and it seems to work:

NEXTFRAME: t=GetTickCount();
            InvalidateRect(wn,0,0); RedrawWindow(wn,0,0,RDW_UPDATENOW);
            for(j=0;j<4;j++) {if(!isdigit(MFN[i+j])) goto DEF; FN[j]=MFN[i+j];}
            fn=(FN[0]-'0')*1000+(FN[1]-'0')*100+(FN[2]-'0')*10+FN[3]-'0'+1;
            if(fn>9999) goto DEF;     
     FN[3]++; if(FN[3]>'9') {FN[3]='0'; FN[2]++;}
            if(FN[2]>'9') {FN[2]='0'; FN[1]++;}
            if(FN[1]>'9') {FN[1]='0'; FN[0]++;}
     MFN[i]=FN[0]; MFN[i+1]=FN[1]; MFN[i+2]=FN[2]; MFN[i+3]=FN[3];
     if(!readfile(I,MFN,wn)) goto DEF; // read from file MFN to image I, running under Windows window wn.
            do {} while(GetTickCount()-t<33); goto NEXTFRAME;}

;

but the loop in the last line looks like it ties up the computer until time comes to display the next frame, instead of letting aniother process run.

Re: TIming

Anthony Appleyard16-Nov-09 23:41

Anthony Appleyard

16-Nov-09 23:41

I would have thought that, in these times when desktop computers can run at a gigahertz and more, that it would be routinely easy for a C++ program to time events by the microsecond.

Re: TIming

Jeff Archer17-Nov-09 2:34

Jeff Archer

17-Nov-09 2:34

It's really not that complicated once you have done it a couple of times. The do while loop that you are using is extremely wasteful in terms of CPU utilization. The proper way to block a thread is with WaitForMultipleObjects. Also, you should never block the main thread of your application. The best solution would really be to use a background thread to draw on a BITMAP and use use BitBlt to transfer the image to the screen every 333 ms.
As a side note the values returned by GetTickCount are really only accurate to 15.2 ms so using it to time 33 ms isn't going to work well on a loaded machine. The advantage of the multimedia timer is that you can truely have 1 ms accuracy. And by using a background thread and proper thread synchronization your code will scale properly on faster and multi core machines and still work correcly on a slower or heavly loaded machine.

Re: Timing

Anthony Appleyard17-Nov-09 19:09

Anthony Appleyard

17-Nov-09 19:09

In this case I need to wait not 333ms absolutely, but (333ms minus (the time taken to read that frame from a file)).

How to add a dual interface to a non-ATL, non-MFC Application [closed]

jmen@moc16-Nov-09 2:15

jmen@moc

16-Nov-09 2:15

Hello VC++ gurus,
I have to add a dual interface to a non-MFC, non-ATL application.
I have a non-ATL, non-MFC enabled project and a plain Win32 application. Now, this Win32 exe must expose some services through an IDispatch interface.
My question: Can I somehow use ATL to help me with that IDispatch implementation? Event if the project is a non-ATL project?
Note: My Win32 exe must act as Local Server (CLSCTX = CLSCTX_LOCAL_SERVER) here.

I'll appreciate your help a lot.
Regards

P.S.: Thanks to all how replied to this thread.
I'll try to use ATL in my non-ATL project: use CComObjectRootEx, CComCoClass, IDispatchImpl and CAtlModuleT<base> etc. straight away. So far, it looks OK.
Regards,
Joerg

Re: How to add a dual interface to a non-ATL, non-MFC Application

Richard MacCutchan16-Nov-09 3:05

Richard MacCutchan

16-Nov-09 3:05

Getting the most out of IDispatch[^] may have the answer you are looking for.

Re: How to add a dual interface to a non-ATL, non-MFC Application

jmen@moc16-Nov-09 3:57

jmen@moc

16-Nov-09 3:57

Thanks. Now, let me try to understand the XYZDispatchDriver: does it assume that the IDispatch Interface has been defined (in an IDL) and a coclass has been implemented? Or, is this created dynamically on the fly?
In my situation, I do not yet have IDL defined, class implemented.
Regards,
Joerg

Re: How to add a dual interface to a non-ATL, non-MFC Application

Richard MacCutchan16-Nov-09 4:14

Richard MacCutchan

16-Nov-09 4:14

Sorry, I'm not a COM expert, I just remembered this article from my own studies on the subject. You could try posting your question at the end of the article as it will then go to the author, who probably is an expert.

Re: How to add a dual interface to a non-ATL, non-MFC Application

jmen@moc16-Nov-09 4:22

jmen@moc

16-Nov-09 4:22

Thanks anyway. Smile | :)

Re: How to add a dual interface to a non-ATL, non-MFC Application

CPallini16-Nov-09 5:42

CPallini

16-Nov-09 5:42

See here [^].
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: How to add a dual interface to a non-ATL, non-MFC Application

jmen@moc16-Nov-09 5:54

jmen@moc

16-Nov-09 5:54

I've seen that; just trying to be lazy and avoid all that handwriting... Is there a "lazy way"?

Re: How to add a dual interface to a non-ATL, non-MFC Application

CPallini16-Nov-09 6:13

CPallini

16-Nov-09 6:13

jmen@moc wrote:
Is there a "lazy way"?
Quote Selected Text

Yes: ATL (Active Template Laziness). Smile | :)

Re: How to add a dual interface to a non-ATL, non-MFC Application

Nemanja Trifunovic16-Nov-09 7:05

Nemanja Trifunovic

16-Nov-09 7:05

CPallini wrote:
Yes: ATL

Using ATL once you know it is "laziness" (in a good way), but learning it?

utf8-cpp

Re: How to add a dual interface to a non-ATL, non-MFC Application

CPallini16-Nov-09 8:36

CPallini

16-Nov-09 8:36

I don't need a code obfuscator: I'm writing a template library wrapping COM.
--The ATL's author, former Klingon developer.

I don't need to learn it, I just need to use it.
--The VB6 developer

Big Grin | :-D

Re: How to add a dual interface to a non-ATL, non-MFC Application

jmen@moc16-Nov-09 8:38

jmen@moc

16-Nov-09 8:38

You mean, I can add ATL templates, macros and an ATL IDispatch implementation, eveen if my project is not an ATL Project? Would be good enough for me.
Regards, Joerg

Re: How to add a dual interface to a non-ATL, non-MFC Application

CPallini16-Nov-09 9:38

CPallini

16-Nov-09 9:38

I suppose (note: suppose) it would be simpler transforming you project in a ATL one.
Smile | :)

Re: Off topic

Richard MacCutchan16-Nov-09 7:34

Richard MacCutchan

16-Nov-09 7:34

A message in Italian in the .NET Framework forum; can you help with it?

Re: Off topic

CPallini16-Nov-09 9:22

CPallini

16-Nov-09 9:22

There's something wrong in the post: it looks like a direct request to another Italian woman (i.e an e-mail (un)intentionally posted on the forum). The same poster was able to write a request in good English here http://www.codeproject.com/Messages/3272888/Re-Problem.aspx[^].
Smile | :)

Win32 DLL Resource not found Error

Nitheesh George16-Nov-09 1:56

Nitheesh George

16-Nov-09 1:56

Hi every one,

I develpoing a MFC application which uses a Win32 dll. This Win32 dll contains a DIALOG Box resource. I wanted to show this dialog by calling an exported function from this dll. But when calling this dialog through
DialogboxParam API it returns with error 1812( RESOURCE NOT FOUND). I am solved this problem in MFC by calling AFX_MANAGE_STATE(AfxGetStaticModuleState( )). How to do this in Win32 way.

thanks

Nitheesh

Jose Jo Martin

http://www.simpletools.co.in

Re: Win32 DLL Resource not found Error

Iain Clarke, Warrior Programmer16-Nov-09 2:13

Iain Clarke, Warrior Programmer

16-Nov-09 2:13

For pure Win32...

The DialogBox function has a first parameter of

hInstance

, which is the HINSTANCE of the DLL where you get the resource from.

If you loaded the DLL using LoadLibrary, then you already have that parameter. If not, then when the DllMain function of the DLL is called at load time, then the HINSTANCE is passed then. Just remember it!
(ie, in a extern variable that all the CPP files in the DLL have access to.

That's how I did it in the old days!

Iain.

I have now moved to Sweden for love (awwww).
If you're in Scandinavia and want an MVP on the payroll (or happy with a remote worker), or need contract work done, give me a job! http://cv.imcsoft.co.uk/[^]

Re: Win32 DLL Resource not found Error

Nitheesh George16-Nov-09 2:55

Nitheesh George

16-Nov-09 2:55

Hi Iain,

I am loading the dll using LoadLibrary from a MFC application. And i am using a global HINSTANCE value from DllMain.But still this cause problem. Is this cause the resource handle of the dll be changed?

thanks

Nitheesh

Jose Jo Martin

http://www.simpletools.co.in

Re: Win32 DLL Resource not found Error

Iain Clarke, Warrior Programmer16-Nov-09 3:02

Iain Clarke, Warrior Programmer

16-Nov-09 3:02

Erm, your first email said you were succeeding with MFC.
I told you how to do things in pure Win32.
Now you say you still have problems.

These facts do not fit each other.

Please expand on what you are doing, so I can help better,

Iain.

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