How you will define the structure model of Sigmund Freud "Id, ego, and super-ego" in C ? :) - C / C++ / MFC Discussion Boards

ggoutam711-May-10 18:24

11-May-10 18:24

Hello,

Thank you for trying to solve this problem.

I am using samples from "Understanding COM Event Handling" by Lim Bio Liong... URL below :
Understanding COM Event Handling[^]

I am trying to fire event from a ATL dll file, callable from client.
To fire event I need to use class template.
I am using extern "C" before the function name in ATL dll file, to export this function and to make it visible at client.

Below is full code :

__declspec(dllexport) void Init(SMESSAGE* sMessage);
EXTERN_C const IID DIID__IEventFiringObjectEvents;

template <class T>
class CProxy_IEventFiringObjectEvents : public IConnectionPointImpl<T, &DIID__IEventFiringObjectEvents, CComDynamicUnkArray>
{
    //extern "C" __declspec(dllexport) void Init(SMESSAGE* sMessage)
    __declspec(dllexport) void Init(SMESSAGE* sMessage)
    {
        CComVariant varResult;
        VARIANT          var;
        T* pT = static_cast<T*>(this);
        int nConnectionIndex;
        int nConnections = m_vec.GetSize();

        for (nConnectionIndex = 0; nConnectionIndex < nConnections; nConnectionIndex++)
        {
            pT->Lock();
            CComPtr<IUnknown> sp = m_vec.GetAt(nConnectionIndex);
            pT->Unlock();
            IDispatch* pDispatch = reinterpret_cast<IDispatch*>(sp.p);

            if (pDispatch != NULL)
            {
                VariantInit(&var);
                VariantClear(&var);
                V_VT(&var) = VT_RECORD | VT_BYREF;
                V_RECORD(&var) = &sMessage;

                DISPPARAMS disp = { &var, NULL, 5, 0 };
                pDispatch->Invoke(0x4, IID_NULL, LOCALE_USER_DEFAULT, DISPATCH_METHOD, &disp, &varResult, NULL, NULL);
            }
        }
    }

};

Thanking you in advance,
Goutam

Re: Try ifdef __cplusplus

Software_Developer11-May-10 19:01

Software_Developer

11-May-10 19:01

It is true, You cannot use extern "C" with classes and templates.

In the C language, the string-literal "C" is not recognized. It is used in C++ to prevent name decoration.

Remove the string-literal "C" in extern declarations, or use the following in the function declaration:

<pre>#ifdef __cplusplus
   extern "C"
#endif

http://support.microsoft.com/kb/133070[^]

Re: Use of extern "C" in class template

ggoutam711-May-10 21:27

ggoutam7

11-May-10 21:27

Thank you for all.
I just tested and verified that I can export function even without extern "C" from a dll.

how to send data to multiple clients from single server mfc or winsock

sravu2511-May-10 15:59

sravu25

11-May-10 15:59

hi,

how to send data to multiple clients from single server.i can send data to single clients but how to handle multiple client. can any one provide code for that part.

sravanthi

Re: how to send data to multiple clients from single server mfc or winsock

hanq_3891013011-May-10 16:42

hanq_38910130

11-May-10 16:42

In main thread you listen for client connections. Once you got a client connection, you can create a corresponding socket and thread.Then all the communication can be handled in that thread using that socket.

Of course, if there are too many client to deal with, this is not a good way. You can use iocp instead.

Re: how to send data to multiple clients from single server mfc or winsock

sravu2511-May-10 22:41

sravu25

11-May-10 22:41

i am using data gram socket where listen and accept will not be used.
i want just to handle three to four clients. can u please provide that part of code.

Re: how to send data to multiple clients from single server mfc or winsock

«_Superman_»11-May-10 17:16

«_Superman_»

11-May-10 17:16

You can use multicasting for this - http://en.wikipedia.org/wiki/Multicast[^]

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

How you will define the structure model of Sigmund Freud "Id, ego, and super-ego" in C ? :)

phicho11-May-10 10:40

phicho

11-May-10 10:40

i go with this simple structure

typedef struct sturctEGO {<br />
int ID;<br />
int Superego; <br />
int Ego = Superego - ID; <br />
} Me;

Am i right ? Smile | :)

the theory http://en.wikipedia.org/wiki/Id,_ego,_and_super-ego

Re: How you will define the structure model of Sigmund Freud "Id, ego, and super-ego" in C ? :)

Richard MacCutchan11-May-10 11:29

Richard MacCutchan

11-May-10 11:29

Had you actually tried to compile this before asking the question you would have noticed that the line

int Ego = Superego - ID;

produces a number of errors, as it is an invalid expression. Other than that your structure may or may not have some use.

It's time for a new signature.

Re: How you will define the structure model of Sigmund Freud "Id, ego, and super-ego" in C ? :)

CPallini11-May-10 11:30

CPallini

11-May-10 11:30

Craps: you're an idiot!
You're simply wrong.
Well, it is pretty good, but you probably can do better.
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 you will define the structure model of Sigmund Freud "Id, ego, and super-ego" in C ? :)

phicho11-May-10 18:21

phicho

11-May-10 18:21

It's not for any use...only to help informatics students understand better the structure model of Sigmund Freud the ones that listen psychology class in high school

Re: How you will define the structure model of Sigmund Freud "Id, ego, and super-ego" in C ? :)

Richard MacCutchan11-May-10 22:10

Richard MacCutchan

11-May-10 22:10

phicho wrote:
to help informatics students understand better the structure model of Sigmund Freud

I don't think it will help anyone to understand anything.

It's time for a new signature.

Re: How you will define the structure model of Sigmund Freud "Id, ego, and super-ego" in C ? :)

sashoalm11-May-10 22:38

sashoalm

11-May-10 22:38

You should have posted this in the Lounge.

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

Windows Obscured or not.

Prakash Nadar11-May-10 10:25

Prakash Nadar

11-May-10 10:25

Hi,

Is there a way to know if a window is completely Obscured i.e the window is "not visible" to the user but it is behind another larger application window.

I am trying to do or not do something if the window is completely hidden from the user but not made invisible.

Thanks in advance.

Re: Windows Obscured or not. [modified]

Garth J Lancaster11-May-10 11:58

Garth J Lancaster

11-May-10 11:58

I'd have thought you would enumerate each window and look at their clipping regions - what I dont know is if you can do this in some 'order' ie from 'front' (of screen) to back or 'depth'

Bizarrely enough, I was just checking out this An HTML5 Remote Desktop - Part I[^] and he starts with some routines that might interest you

[edit]
This may be a better way of getting all HWNDS - you'd still then have to traverse the windows represented, testing for intersections etc

http://www.gettingclever.com/2008/12/list-your-hwnds.html[^]

[/edit]

'g'

modified on Tuesday, May 11, 2010 6:08 PM

Re: Windows Obscured or not.

Prakash Nadar12-May-10 5:23

Prakash Nadar

12-May-10 5:23

Thanks,

I will have alook, I should have specified that i was looking for a windows event something WM_blahblah.

Re: Windows Obscured or not.

Randor 11-May-10 15:39

Randor

11-May-10 15:39

Hi,

The GetClipBox Function[^] will return a NULLREGION if the window is completely obscured. Unfortunately this will not work if DWM/Aero is enabled and you will probably need to calculates the intersections.

http://www.codeproject.com./Messages/2812397/Re-Windows-Api-Control-Visible.aspx[^]

Best Wishes,
-David Delaune

Re: Windows Obscured or not.

Prakash Nadar12-May-10 5:26

Prakash Nadar

12-May-10 5:26

Yeah, sounds interesting except for the caveat. I need to be make it work for all versions of Windows. Smile | :)

dirDDBox and dirListBox

Andraw Tang11-May-10 9:26

Andraw Tang

11-May-10 9:26

Hi, dear all,

I am using VB6. I am running a program created years ago. when I open a form, I got the following error:

Line 75: Property OleObjectBlob in dirDDBox could not be set.
Line 75: Cannot load control dirDDBox; license not found.
Line 83: Property OleObjectBlob in dirListBox could not be set.
Line 83: Cannot load control dirListBox; license not found.

Are dirDDBox and dirListBox shipped with VB6? or belong some other control that need register?

After I run VB6Cli.exe utility, still got the same error.

Can anybody help me. Thanks a lot.

Re: dirDDBox and dirListBox

Code-o-mat11-May-10 9:34

Code-o-mat

11-May-10 9:34

Try asking at the Visual Basic Messageboard[^] instead, this is for C/C++/MFC.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <

Re: dirDDBox and dirListBox

Andraw Tang11-May-10 9:38

Andraw Tang

11-May-10 9:38

Sorry, put in a wrong place.

Re: dirDDBox and dirListBox

Code-o-mat11-May-10 9:41

Code-o-mat

11-May-10 9:41

No problems, happens to the best of us. Smile | :)

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <

porta_01011-May-10 6:00

11-May-10 6:00

jeron111-May-10 6:16

11-May-10 6:16

Code-o-mat11-May-10 6:22

Code-o-mat

11-May-10 6:22

I have seen a few posts which didn't share enough details about the subject to get a usefull answer but wow, hey, this one tops them all. Big Grin | :-D

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <

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