C / C++ / MFC Discussion Boards

Jijo.Raj3-Jul-08 1:10

3-Jul-08 1:10

You can use the CRT built in support to track memory leaks. Use the api - _CrtDumpMemoryLeaks(). Check this for how to use it - http://weseetips.com/2008/06/17/how-to-detect-memory-leaks-by-using-crt/[^]

Another good article about detecting and isolating memory leaks. Seems good one - http://software.myjoin.cn/article/article0006.htm[^]

Regards,
Jijo.

_____________________________________________________

http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

Re: Memory Leak

Hamid_RT3-Jul-08 1:40

Hamid_RT

3-Jul-08 1:40

Memory leak finder[^].

how to make messenger styple popup in bottom right corner

garyofcourse3-Jul-08 0:07

garyofcourse

3-Jul-08 0:07

Hi, Im programming in visualC++ with MFC in vs2008.

When using some applications like instant messenger, whenver someone signs in there is a popup in the bottom right corner of the screen saying 'xyz has signed in'. I want to make a popup like that. It should rise up from the status bar and then drop back down into it the way it happens in messenger. In addition the rest of the program should not stop running when that popup is rising up and lowering down.

Except I have no idea how to do this.. Can anyone offer some tips, name some APIs or link me to some articles on this? Im not exactly sure what this topic is called so I cant even do a decent search on it.

Thanks for any help.

Re: how to make messenger styple popup in bottom right corner

Nibu babu thomas3-Jul-08 0:50

Nibu babu thomas

3-Jul-08 0:50

garyofcourse wrote:
Hi, Im programming in visualC++ with MFC in vs2008.

garyofcourse wrote:
When using some applications like instant messenger, whenver someone signs in there is a popup in the bottom right corner of the screen saying 'xyz has signed in'. I want to make a popup like that. It should rise up from the status bar and then drop back down into it the way it happens in messenger. In addition the rest of the program should not stop running when that popup is rising up and lowering down.

You can use CMFCDesktopAlertWnd[^] if you are using MFC feature pack.

Else you need to create a top most popup window most probably a captionless dialog will do and then use AnimateWindow to make the window slide/fade in.

Also you've got to make the window appear alongside the window's taskbar so take note of the taskbar position too.

Nibu babu thomas
Microsoft MVP for VC++

Code must be written to be read, not by the compiler, but by another human being.

Programming Blog: http://nibuthomas.wordpress.com

Re: how to make messenger styple popup in bottom right corner

garyofcourse3-Jul-08 3:59

garyofcourse

3-Jul-08 3:59

Thanks Nibu Babu, I will look into that. In addition someone on codeguru pointed out this article : http://www.codeguru.com/cpp/w-d/dislog/miscellaneous/article.php/c4989/[^] I'l try both methods. Thanks again.

A very intersting code

Dracula Wang3-Jul-08 0:03

Dracula Wang

3-Jul-08 0:03

when i look into 7z's code,
find this:

namespace NSignature
{
  UInt32 kLocalFileHeader   = 0x04034B50 + 1;
  UInt32 kDataDescriptor    = 0x08074B50 + 1;
  UInt32 kCentralFileHeader = 0x02014B50 + 1;
  UInt32 kEndOfCentralDir   = 0x06054B50 + 1;
  UInt32 kZip64EndOfCentralDir   = 0x06064B50 + 1;
  UInt32 kZip64EndOfCentralDirLocator   = 0x07064B50 + 1;
  
  class CMarkersInitializer
  {
  public:
    CMarkersInitializer() 
    { 
      kLocalFileHeader--; 
      kDataDescriptor--;
      kCentralFileHeader--;
      kEndOfCentralDir--;
      kZip64EndOfCentralDir--;
      kZip64EndOfCentralDirLocator--;
    }
  };
  static CMarkersInitializer g_MarkerInitializer;
}

i really wonder why they did this?
do any body have read this code?
Thanks

Re: A very intersting code

Dracula Wang3-Jul-08 0:07

Dracula Wang

3-Jul-08 0:07

0x04034B50;
0x08074B50;
0x02014B50;
0x06054B50;
0x06064B50;
0x07064B50;
those code are const, why add 1 and then sub 1?

Re: A very intersting code

KarstenK3-Jul-08 1:07

KarstenK

3-Jul-08 1:07

I guess for getting the number in the first instance. A second gets it lowered by 1. Unsure | :~

Greetings from Germany

How can set text of button at runtime?

Le@rner2-Jul-08 23:47

Le@rner

2-Jul-08 23:47

Hi all,

Can anyone tell me how can i set the text of any button at runtime.

Thanks in advance.

IN A DAY, WHEN YOU DON'T COME ACROSS ANY PROBLEMS - YOU CAN BE SURE THAT YOU ARE TRAVELLING IN A WRONG PATH

Re: How can set text of button at runtime?

Rajesh R Subramanian2-Jul-08 23:53

Rajesh R Subramanian

2-Jul-08 23:53

SetWindowText()[^] ?

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Visual C++ MVP

Re: How can set text of button at runtime?

_AnsHUMAN_ 2-Jul-08 23:54

_AnsHUMAN_

2-Jul-08 23:54

buttonObj.SetWindowText(/*parameter*/)

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: How can set text of button at runtime?

Paresh Chitte2-Jul-08 23:54

Paresh Chitte

2-Jul-08 23:54

Use SetWindowText API.

Regards,
Paresh.

Re: How can set text of button at runtime?

Hamid_RT3-Jul-08 1:38

Hamid_RT

3-Jul-08 1:38

Or you can use of SetDlgItemText or WM_SETTEXT.

UAC in Vista

subramanyeswari2-Jul-08 23:35

subramanyeswari

2-Jul-08 23:35

Hi,

I read that if Vista sees an external manifest file if will enable prompt. That's why we have to embed manifest file in the exe to enable application for UAC. Is it right? If any one knows that link can u send me that link.
I am trying to find that link for couple of hours but i am not able to find it now.

Thanks

Re: UAC in Vista

Rajesh R Subramanian2-Jul-08 23:55

Rajesh R Subramanian

2-Jul-08 23:55

Which link? Confused | :confused:

If you have a query, may be someone can answer you, not that you have to go back to that link.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Visual C++ MVP

Re: UAC in Vista

subramanyeswari3-Jul-08 2:17

subramanyeswari

3-Jul-08 2:17

My question is why should I embed manifest file in the exe to run in Vista.

Regards

Re: UAC in Vista

Nibu babu thomas3-Jul-08 3:35

Nibu babu thomas

3-Jul-08 3:35

subramanyeswari wrote:
My question is why should I embed manifest file in the exe to run in Vista.

Can you check this[^] video on channel 9.

Google search on this topic[^]

Nibu babu thomas
Microsoft MVP for VC++

Code must be written to be read, not by the compiler, but by another human being.

Programming Blog: http://nibuthomas.wordpress.com

How to Clear IE history under a limited account of VISTA

moye25012-Jul-08 22:26

moye2501

2-Jul-08 22:26

The code works under XP, both administrator or limited account.
But when I run it under Vista, it works under a administrator account, but doesn't work under limited account.
Sometimes, the history is cleared at first, but it appears again when I restart IE.

The code is shown as follow:

USES_CONVERSION;
CoInitialize(NULL);

TCHAR szSpecialFolderPath[MAX_PATH];
::SHGetSpecialFolderPath(::GetDesktopWindow(), szSpecialFolderPath, CSIDL_HISTORY, FALSE);

IUrlHistoryStg2* pUrlHistoryStg2 = NULL;
HRESULT hr = CoCreateInstance(CLSID_CUrlHistory, NULL, CLSCTX_ALL, IID_IUrlHistoryStg2, (void**)&pUrlHistoryStg2);
if(SUCCEEDED(hr))
{
    hr = pUrlHistoryStg2->ClearHistory();
    pUrlHistoryStg2->Release();
    CoUninitialize();
    return TRUE;
}
else
{
    CoUninitialize();
    return FALSE;
}

Thanks a lot!

The stack conventions are different in AfxBeginThread and CreateThread

followait2-Jul-08 21:37

followait

2-Jul-08 21:37

With AfxBeginThread, it is __cdecl,
with CreateThread, it is __stdcall.

Is there an safe API wait to create a thread in MFC?
CreateThread?
I'd like to the easier one, if there is.

Re: The stack conventions are different in AfxBeginThread and CreateThread

Iain Clarke, Warrior Programmer2-Jul-08 22:03

Iain Clarke, Warrior Programmer

2-Jul-08 22:03

followait wrote:

Is there an safe API wait to create a thread in MFC?

Err, AfxBeginThread is an MFC function...

Not sure what else you're after.

Iain.

Plz sir... ^CPallini ^CPallini abuz drugz, plz plz help urgent.

Re: The stack conventions are different in AfxBeginThread and CreateThread

Saurabh.Garg2-Jul-08 22:12

Saurabh.Garg

2-Jul-08 22:12

followait wrote:
I'd like to the easier one, if there is.

Nothing is easy in multi-threading.

-Saurabh

Re: The stack conventions are different in AfxBeginThread and CreateThread

CPallini2-Jul-08 22:22

CPallini

2-Jul-08 22:22

Philosophical mood this afternoon?
Big Grin | :-D

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: The stack conventions are different in AfxBeginThread and CreateThread

Saurabh.Garg2-Jul-08 22:27

Saurabh.Garg

2-Jul-08 22:27

Yes!! Trying to finish this boring piece of code before I call it day Sniff | :^)

But I guess that statement is pretty much always true for any non-trivial applications Poke tongue | ;-P

-Saurabh

Re: The stack conventions are different in AfxBeginThread and CreateThread

Roger Stoltz2-Jul-08 22:23

Roger Stoltz

2-Jul-08 22:23

When you're using MFC you have to use AfxBeginThread due to internal workings of the framework.

For more info:
http://www.flounder.com/badprogram.htm#beginthread[^]

The best starting point for multithreading can be found here[^].

"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown

How to hide a public function inherit from base class

Dracula Wang2-Jul-08 21:27

Dracula Wang

2-Jul-08 21:27

I have 2 classes, B inherit from A, but actually A have a function: fun should not present in B, so I code as blow,

class A{
public:
    virtual void fun(){cout << "a" << endl; };
};

class B : public A{
    virtual void fun(){};
};

But this take no effect, I can call the fun in class b,

int main()
{
    A a;
    B b;
    A *pa = new B;

    a.fun();
    b.A::fun();
    pa->fun();
}

the output is

a
a

How to decline the function call?
Thanks.

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