C / C++ / MFC Discussion Boards

Raphael Kindt15-Sep-02 21:59

15-Sep-02 21:59

Hello world...
Anybody have a good idea to control the errors in a program?
I often return an error ID from a function...
I've already use Exception but I found that not very usefull...
I've tried with a specific thread which uses a loop. Like this:

volatile int error = 0;  // global
CEvent g_eventStart;  // global

UINT CatchErrorThread(LPVOID pParam)
{
   CWnd* MyDlg = CWnd::FromHandle((HWND)pParam);
   do {
      ::WaitForSingleObject(g_eventStart, INFINITE);
      g_eventStart.ResetEvent();
      switch(error) {
      case 0:
         break;
      case 1:
         MyDlg->MessageBox("error message 1", "catch error", MB_ICONERROR | MB_OK);
         break;
      case 2:
         MyDlg->MessageBox("error message 2", "catch error", MB_ICONERROR | MB_OK);
         break;
      default:
         MyDlg->MessageBox("unknown message", "catch error", MB_ICONERROR | MB_OK);
         break;
      }
   } while(error != 0);
   return 0;
}

There is not another solution to make pass the errors???
Anybody have another solution???

Thanks in advance...

Hello World!!! Smile | :)

from Raphaël

Re: Error control

Bill Wilson16-Sep-02 5:48

Bill Wilson

16-Sep-02 5:48

Pretty hard to tell what this code is supposed to accomplish. Is the variable error assigned somewhere? It appears to be undefined in your code. Maybe you need something like

int error = g_eventStart.ResetEvent();

although that is just a guess. The code you presented would, of course, not even compile, unless error is some kind of global, set by the ResetEvent method?

<small>
You wrote:

I've already use Exception but I found that not very usefull...
I've tried with a specific thread which uses a loop. Like this:


</small>

This makes it sound like you are trying to use a thread in a loop to perform the same function as exception handling. Sorry, but that makes absolutely no sense. Handling errors is one topic, but I fail to see what a separate thread has to do with anything.

I think you should try harder with exceptions.

Re: Error control

Raphael Kindt16-Sep-02 6:42

Raphael Kindt

16-Sep-02 6:42

My aim is to catch an error ID and display a message error corresponding to this ID. I try to find any methods who can help me...

My code before work correctly...
the variable error is global.
When a error occure (for example a NULL handle is an error), I do this :

if(!MyHandle) {
   error = ERR_001; // with #define ERR_001 1
   g_eventStart.SetEvent();  // I display the error message with this ID
}

The advantage is that I can do that in my program anywhere.

But, yes, I'm a not an expert with Exception...
Thus this thread with his loop is doing the same thing as Exception!
I didn't know that!

What methods use you to catch error?

thanks

Hello World!!! Smile | :)

from Raphaël

Re: Error control

Bill Wilson16-Sep-02 6:54

Bill Wilson

16-Sep-02 6:54

You could do something like this...

in the calling program

   try {
      int x = SomeProcedure();
...

   }
   catch (CMyException *e)
   {
     // Do something with the error return
        LogError(e->nMyErrorNum....

     delete e;
   }



int SomeProcedure()
{
   n = new CMyClass();
   if (!n)  {
       CMyException* pErr = new CMyException(TRUE);
       pErr->errNum = ERRORNUMBERIWANTTOUSE;
       throw pErr;
   }
...


Define class CMyException

class CMyException : public CException {
   int nMyErrorNum;

...




 

Hope this helps

Re: Error control

Raphael Kindt16-Sep-02 22:28

Raphael Kindt

16-Sep-02 22:28

Thanks for this advice...

Hello World!!! Smile | :)

from Raphaël

Urgent help on Toolbars

haroonaslam15-Sep-02 21:02

haroonaslam

15-Sep-02 21:02

Toolbars position on parent size
I have a problem with the position of the toolbars. For a better discription, open wordpad. Dock the toolbars side by side so that they both are in the same row. Now resize the main frame window so that to reduce the size from the right side to the left. Reduce to the smallest possible horizontal width. Notice that the second toolbar that you docked on the right of the first one has moved down. Now resize to increase the size. Notice that the toolbar is NOT moved back to right of the first toolbar. i.e. to its original position before reducing size.
I need to reposition it when the size is increased. Also, I need the docking support on all sides of frame, dynamic size and dock state toggle on double click, so simple rebar cannot be used.
MS Office uses the msoCommandBar which does all the desired, but i cant use it as i dont have its class, control or documentation.
The environment I am using is Visual C++ 6.0 with sp5.

Any ideas how this can be done?

The "Best" is what you can never achieve.

Displaying jpeg file

suresh_sathya15-Sep-02 20:10

suresh_sathya

15-Sep-02 20:10

I want to display the jpeg file in the window.How to do this.Is it possible to use load bitmap function.I tried to import the jpeg file,but when i import it is asking resource type.i dont know what to give the resource type.Can anyone tell me how to solve this.

Re: Displaying jpeg file

.dan.g.15-Sep-02 20:15

.dan.g.

15-Sep-02 20:15

checkout this article:

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

Re: Displaying jpeg file

Bill Gates Antimatter Particle15-Sep-02 22:28

Bill Gates Antimatter Particle

15-Sep-02 22:28

I havent looked at the other suggestion. But I suspect this is a more modern solution. Check out http://msdn.microsoft.com/msdnmag/issues/01/10/c/c0110.asp, there is lots of useful stuff here aswell.

"Life begins at 140"

How to detect and reset an AudioStream?

DengJW15-Sep-02 19:55

DengJW

15-Sep-02 19:55

I am developing a mediaplayer by customising Windows Mediaplayer Control. The mediaplayer should have the ability to detect whether there is already an audio playback running on the Windows 98/2000. If there is one running, the mediaplayer should stop it and start to run its own.

I know there is a property in Mediaplayer control which is called AudioStream, the value of which has been set to -1 be default. But I don't know how to make use of it.

Any help are greatly appreciated.

DJ

Programmatically setting min.NT password length.

abhinarulkar15-Sep-02 19:34

abhinarulkar

15-Sep-02 19:34

Hi All,
I need to create a program that would first check whether a minimum password length has been set or not,if it is not set then the program would set the minimum password length.How do I solve this problem.
Thanks
Abhishek.

Learning is a never ending process of Life.

Re: Programmatically setting min.NT password length.

Simon.W16-Sep-02 3:42

Simon.W

16-Sep-02 3:42

Try Netxxxxx APIs,Such as NetUserxxx,NetGroupxxx,sorry,I don't know clearly

I am seeking...
For what?
Why did you ask me for what? I don't know!

Re: Programmatically setting min.NT password length.

abhinarulkar16-Sep-02 4:17

abhinarulkar

16-Sep-02 4:17

Thanks for the help.
Abhishek

Learning is a never ending process of Life.

Hello,everyone.I come here first,anyone can help me?

Jozu15-Sep-02 19:22

Jozu

15-Sep-02 19:22

For replace the Ctl+Alt+Del SAS, I wrote a dll name mygina.dll,and copy it to system directory, wrote registry just make it usable;and some trouble come!, for to debug, I wrote "DebugBreak()" before I want break, But when the windows boot up, I got a "need replace gina.dll" message,why? and how can I break the code and to debug it?

OMG | :OMG:

Re: Hello,everyone.I come here first,anyone can help me?

Mustafa Demirhan15-Sep-02 20:52

Mustafa Demirhan

15-Sep-02 20:52

Is this supposed to be funny or what?

Mustafa Demirhan
http://www.macroangel.com
Sonork ID 100.9935:zoltrix

<nobr>They say I'm lazy but it takes all my time

Thank for reply.but...

Anonymous15-Sep-02 21:14

Anonymous

15-Sep-02 21:14

I just want debug my gina.dll, but if I put a debug version on system directory, I will get a dialog box that tell me "you need replace the gina.dll", and system hang up, only goto reboot.
I mean how can i debug the gina.dll?
Confused | :confused:

Open the *.chm file in VC++

Anonymous15-Sep-02 18:22

Anonymous

15-Sep-02 18:22

Hi...
Can please someone help me...how do i want to open the compiled help file (*.chm) in VC++

Rgds

Re: Open the *.chm file in VC++

Dave Bryant15-Sep-02 18:52

Dave Bryant

15-Sep-02 18:52

As far as i am aware you can't open CHMs in visual studio. Use Microsoft HTML Help Workshop, or help authoring tool such as HyperText Studio or RoboHelp.

Dave

Open the *.chm file in VC++

15-Sep-02 20:13

I know that we can open it using the HTML workshop...how i want to called it in the VC++ application

Re: Open the *.chm file in VC++

Neville Franks15-Sep-02 20:34

Neville Franks

15-Sep-02 20:34

The HtmlHelp() API function works well for me.

Neville Franks, Author of ED for Windows. www.getsoft.com

Re: Open the *.chm file in VC++

KarstenK16-Sep-02 2:48

KarstenK

16-Sep-02 2:48

The Htmlhelp api will Do the job but dont ferget to #define the IDs in the HMTL workshop. Smile | :)

Re: Open the *.chm file in VC++

Omar Lodhi16-Sep-02 23:13

Omar Lodhi

16-Sep-02 23:13

find out this function in the msdn this will tell you what you have to do for opening chm file.

HtmlHelp(NULL, "My_chm.chm::/A_topic.htm", HH_DISPLAY_TOPIC, 0);

if there is any problem then mail me at gupshuptime@hotmail.com

lodhi

ComboBox - turning OFF autocomplete in CE

Codin' Carlos15-Sep-02 18:09

Codin' Carlos

15-Sep-02 18:09

ComboBox - turning OFF autocomplete in CE... in Windows CE (VC++ 3.0, Pocket PC 2000) the combo boxes do autocomplete (it looks up the first string with the same first char you type in, then fills the edit box with that whole string). THIS IS VERY ANNOYING in CE, especially when trying to use the soft-keyboard to actually enter or EDIT a new string in it's edit box. One beta tester nearly left the room in a rage because she couldn't figure out how to "beat the system". Ugh...

Any Hints? Anyone? Beuller?

Dead | X|

Carlos

Re: ComboBox - turning OFF autocomplete in CE

Jonas Larsson17-Sep-02 4:52

Jonas Larsson

17-Sep-02 4:52

Hmm. I left my pda with the testers today, but as far as I remeber, CComboBox'es doesnt automatically do autocomplete in the edit box, they do it in the small popup window over the SIP. Maybe this is a feature in your program, or maybe Im just remembering it wrong?

Anyway, to disable the autocompletion that the SIP offers (handy on PPC 2000's since they do it for editboxes with ES_PASSWORD too) do this:

<br />
    SIPINFO info;<br />
    SHSipInfo(SPI_GETSIPINFO, 0, &info, 0);<br />
    info.fdwFlags |= SIPF_DISABLECOMPLETION;<br />
    SHSipInfo(SPI_SETSIPINFO, 0, &info, 0);<br />
    SHSipPreference(m_hWnd, SIP_FORCEDOWN);<br />
    SHSipPreference(m_hWnd, SIP_UP);<br />

And to turn it back on:

SIPINFO info;<br />
SHSipInfo(SPI_GETSIPINFO, 0, &info, 0);<br />
info.fdwFlags &= ~SIPF_DISABLECOMPLETION;<br />
SHSipInfo(SPI_SETSIPINFO, 0, &info, 0);

“Our solar system is Jupiter and a bunch of junk” - Charley Lineweaver 2002

Detecting PC peculiarity (vol of disk C ecc..)

nencini15-Sep-02 17:52

nencini

15-Sep-02 17:52

I need a C/C++ program able to detect some peculiarity of the PC (as
the number of the partitions of the hard disk, the number and the label
of the disk C, ecc.) if it is possible without calling the "system"
statement (calling the "system" statement I see alwais the DOS window).
Can you help me ????? - I work with Visual C++ compiler.
Many thanks - Giovanni

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