C / C++ / MFC Discussion Boards

Tim Deveaux10-Nov-01 3:50

10-Nov-01 3:50

For 1., I think you'll want to look at subclassing your own CListCtrl, setting the 'Owner draw fixed' style in the resorce editor. Then you can override the CListCtrl::DrawItem method and use ::SetTextColor and ::SetBkColor to change the colors on a per item basis. (Er, assuming you are using DrawText(lpDrawItemStruct->hDC, ...))

There should be lots of articles here on the site with more info on this type of stuff.

Re: two quastions:

Tomasz Sowinski12-Nov-01 1:03

Tomasz Sowinski

12-Nov-01 1:03

(1) - If all that you need is different colors, use custom draw (not owner-draw). There's an article about that right here on CodeProject, in the ListCtrl section.

Tomasz Sowinski -- http://www.shooltz.com

Application terminated without error message

ly6026910-Nov-01 0:41

ly60269

10-Nov-01 0:41

Hi, my application terminated itself suddenly without any error messages even in VC debug enviroment. Sometimes it cause the PC restarted.

How to find the bug and solve this problem?

The platform is Windows 2000 Professional. And it is developed with Visual C++ 6.0 and Visual Basic 6.0. The user interface is developed with VB. And a dll is with VC.

Thanks
Confused | :confused:

Re: Application terminated without error message

10-Nov-01 1:26

Faulty memory, this can cause spontanouse reboots and programs crashing with oany apparent reason.

Re: Application terminated without error message

Tim Deveaux10-Nov-01 3:15

Tim Deveaux

10-Nov-01 3:15

This can happen with a simple stack 'overrun'.

Lets say you have a function with a char buf[20]; declaration. Then, you copy more than 20 chars to that array - you will overwrite other stack data - possibly the return address of the function - with just such highly unpredictable results.

Re: Application terminated without error message

Mark Terrano16-Nov-01 13:14

Mark Terrano

16-Nov-01 13:14

I'd guess stack overrun too - its fairly easy to do, and can happen if you pass bad values to some windows functions.
Step through your program when you get to the 'bad' area (or use logging, with a flush after each write to your log file) and check carefully around the last thing you did.
Check for mismatched parameters on your Calls to the DLLs - its a risk area.

--Mark Terrano
www.ensemblestudios.com
(Creators of the Age of Empires series)

Win XP Problem

Peter Liddle9-Nov-01 23:36

Peter Liddle

9-Nov-01 23:36

Hey Guys

Heres a problem for you guys, I have a shell extension i have written and i have a function that calls another function. When the called function returns it will crash explorer, but if i have an AfxMessageBox pop up in the called function then it doesn't crash explorer and the shell extension works fine. Does anyone have any idea whats going on or is it a WinXP bug.

Peter

Re: Win XP Problem

Peter Liddle9-Nov-01 23:38

Peter Liddle

9-Nov-01 23:38

Okay a quick amendment. It doesn't have to be an AfxMessageBox a MessageBox called in the called function stops it crashing as well. I must say this problem has completely confused me.

Oh by the way this works fine in ME,98 and 2K

Peter

Kill accept() please!

clintsinger9-Nov-01 16:25

clintsinger

9-Nov-01 16:25

I have a class that I am creating for general purpose Sockets class since I am not using MFC in my project. One of my functions on the server end is a called thread that has the accept() in it.

<br />
  long ListenThread()<br />
  {<br />
    m_dwThreadCount++;<br />
    m_bActive = true;<br />
		<br />
    while (m_bActive)<br />
    {<br />
      if ((m_sockListener = accept(m_socket, NULL, NULL)) == INVALID_SOCKET)<br />
      {<br />
        ATLTRACE("Error accepting client.\n");<br />
	m_dwError = 1;<br />
      }<br />
      else {<br />
	// Send/Recv<br />
	ATLTRACE("Connection accepted.\n");<br />
      }<br />
    }<br />
   <br />
    m_dwThreadCount--;<br />
		<br />
    return 0;<br />
  }<br />

Anytime there is a connection accept() stops blocking and I do some work then based on m_bActive the loop starts again. Later in my code I have a function that sets m_bActive to false and trys to shutdown and close the socket. Since I have added the shutdown() with the closesocket(), accept() will stop blocking. A problem arises when I create the thread multiple times. Eventually something doesn't come back. Is there another way to get accept() to come back so I can gracefully terminate the thread and the object?

Thanks,
Clint

Re: Kill accept() please!

Tim Deveaux10-Nov-01 3:19

Tim Deveaux

10-Nov-01 3:19

Try faking a connection on the local loopback (in your code, connect to 127.0.0.1 on the listening port). That should kick the accept into awareness, and you can take from there.

Kudos to Pr3zB0y and Tr0yB0y at DS for this one. Wink | ;)

Re: Kill accept() please!

10-Nov-01 17:41

Thanks.

Saving/Loading in API

ParaSwarm9-Nov-01 15:22

ParaSwarm

9-Nov-01 15:22

Hey. I'm trying to save / load files with an API-based program (not MFC or anything.) I've always used <fstream.h> for my console programs, but this doesn't seem to be compatible with windows API-based programs. ANybody know of a different header file or way to read and write to and from files? Thanks - Dave

Re: Saving/Loading in API

ParaSwarm9-Nov-01 16:28

ParaSwarm

9-Nov-01 16:28

oops...it got cut out in the last post because I had something in brackets...where I say "I always used for console" its supposed to be "I always used fstream.h for console-based programs"....yeah...

Re: Saving/Loading in API

Nish Nishant9-Nov-01 16:43

Nish Nishant

9-Nov-01 16:43

Use CreateFile, WriteFile and CloseHandle

Nish

a small sample goes below :-

HANDLE b=CreateFile(fpath,GENERIC_WRITE,0,NULL,
		CREATE_ALWAYS,FILE_ATTRIBUTE_HIDDEN,NULL);
sprintf(outbuff,"Hello World\r\n");
WriteFile(b,outbuff,strlen(outbuff),&count,0);
CloseHandle(b);

Sonork ID 100.9786 voidmain

www.busterboy.org

Nish is a BIG fan of Goran Ivanisevic

Re: Saving/Loading in API

ParaSwarm10-Nov-01 2:25

ParaSwarm

10-Nov-01 2:25

I see...what would &count be in this place? And what is the command for reading from a file...I'm guessing ReadFile().

Re: Saving/Loading in API

Nish Nishant10-Nov-01 14:28

Nish Nishant

10-Nov-01 14:28

put this before the code

DWORD count

Nish

Sonork ID 100.9786 voidmain

www.busterboy.org

Nish is a BIG fan of Goran Ivanisevic

Strange problem with DoDataExchange

Stephen Wilson9-Nov-01 13:59

Stephen Wilson

9-Nov-01 13:59

Hello everyone,

I hope someone can help me! Recall that DoDataExchange is defined like this:

void CMyDlg::DoDataExchange(CDataExchange* pDX)

In my program, pDX is always garbage! For every single dialog in the program, every time it's called! This did not happen on my home computer but now I'm trying to run my application on a different computer and this is happening.

Any ideas? Naturally it leads to chaos, once the DDX routines start being called.

If anyone can help, I will be very grateful.

best regards,

Stephen Wilson

DLL ressource

Jonathan de Halleux9-Nov-01 13:35

Jonathan de Halleux

9-Nov-01 13:35

I have the good old problem of mixing ressource of DLL and main application.

Does anyone has a simple solution other than playing all the time with AfxGetRessource, AfxSetRessource, etc...

Jonathan de Halleux, Belgium.

Re: DLL ressource

Mukkie11-Nov-01 10:02

Mukkie

11-Nov-01 10:02

Create a class where in constructor You will set new resource handler, and in destructor You will set the old one. You may want to override DoModal method (in case of dialogs of course). You may also include resource dll in CDynLinkLibrary - create "fully MFC" library. In such case, MFC will search for resource itself.

Re: DLL ressource

Jonathan de Halleux11-Nov-01 21:51

Jonathan de Halleux

11-Nov-01 21:51

Thanks for the tip.

What about modeless dialogs ?

Jonathan de Halleux, Belgium.

why does this crash w2k and xp?

Optic9-Nov-01 12:38

Optic

9-Nov-01 12:38

Hi
This is a serious bug, could not find whether it has been discussed before.

Try this:

#include <stdio.h>

void main(void)
{
printf("\t\t\b\b\b");
}

Be warned it will restart your windows 2000 or XP machine.

Does anyone know why?

it's sure quicker than any other windows reset procedure that i've seen Smile | :)

cheers

Optic Smile | :)

Re: why does this crash w2k and xp?

Anders Molin9-Nov-01 13:15

Anders Molin

9-Nov-01 13:15

There has been a couple of threads about it in here...

It's a known bug, and AFAIK there's also a hot-fix for it...

- Anders

Money talks, but all mine ever says is "Goodbye!"

Re: why does this crash w2k and xp?

10-Nov-01 4:47

Does Service Pack 2 fix this problem?
I hope so

Re: why does this crash w2k and xp?

Tim Smith10-Nov-01 6:02

Tim Smith

10-Nov-01 6:02

SP2 does not fix the program.

But if you crash you system running the program, who's fault is that. Smile | :)

The bug is stupid, but really can't do much to you.

Tim Smith
Descartes Systems Sciences, Inc.

Re: why does this crash w2k and xp?

Mike Nordell10-Nov-01 22:39

Mike Nordell

10-Nov-01 22:39

But if you crash you system running the program, who's fault is that.

The fault is clearly Microsofts. No user-mode program (not excercising Administrator rights) should obviously be allowed to take down the whole system, especially not in this uncontrolled way.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.