Weird windows problem - C / C++ / MFC Discussion Boards

rp_suman9-Jun-08 22:23

9-Jun-08 22:23

What is the use of CreateThread()function's last parameter "LPDWORD lpThreadId
".

Can we give some user defined value to this parameter?

In most of the programs some variable of type DWORD is declared and passed without initialization, is it no problem?

Regards,
Suman

--
"Programming is an art that fights back!"

Re: CreateThread parameter

Cedric Moonen9-Jun-08 22:26

Cedric Moonen

9-Jun-08 22:26

Taken from MSDN:
A pointer to a variable that receives the thread identifier. If this parameter is NULL, the thread identifier is not returned.

It means that it an "outgoing" parameter: you pass the address of a DWORD in which the thread Id will be stored. So, there's no problem in passing an uninitialized DWORD because it won't be read by the CreateThread function.

Cédric Moonen
Software developer

Charting control [v1.4]

Re: CreateThread parameter

rp_suman9-Jun-08 22:41

rp_suman

9-Jun-08 22:41

Hi,

Thanks for the help!!

Regards,
Suman

--
"Programming is an art that fights back!"

Re: CreateThread parameter

jeron110-Jun-08 4:09

jeron1

10-Jun-08 4:09

Since when is saying thanks worthy of a '1' vote?

Re: CreateThread parameter

Joe Woodbury10-Jun-08 6:19

Joe Woodbury

10-Jun-08 6:19

Do note that this parameter is useless for all practical purposes.

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Re: CreateThread parameter

JudyL_MD10-Jun-08 6:43

JudyL_MD

10-Jun-08 6:43

I occasionally use it in logging data if I'm tracking what various threads are doing. It's a little easier on the eyes than using the thread handle.

Judy

Open a debug view while opening a document

beko9-Jun-08 21:33

beko

9-Jun-08 21:33

Hello,

I have a problem with opening a view, while opening a document (MDI).

What i do is I have a configuration file and when i read it, i can open a debug view (richtextview) and see the details about the configuration. I can import as many as configuration files i want. I can also open a document attached with a configuration file, but cannot open the debug view Smile | :)

BOOL Test::OnOpenDocument(LPCTSTR lpszPathName)
{
	if (!CDocument::OnOpenDocument(lpszPathName))
		return FALSE;

	CMainFrame* mainWnd = (CMainFrame*)AfxGetMainWnd();

	// Testing debugwindow open
	mainWnd->OnNewwindowDebugwindow();

	Log().inform("Hello !",getDebugWindow());
}

In above code, the mainframe creates a debug window, and getDebugWindow() just finds the debug view if there is any, and in the OpenDocument, it always returns NULL. the question is how i can create a view while opening a document?

CDebugWindow* Test::getDebugWindow()
{
	if(debugWindow==0)
	{
		POSITION pos = GetFirstViewPosition();
		CView* pView=0;
		bool found=false;
		while (pos != NULL)
		{
		  pView = GetNextView(pos);
		  if(pView->IsKindOf(RUNTIME_CLASS(CDebugWindow)))
		  {
			  found=true;
			  break;
		  }
		  // pView->UpdateWindow();
		}   

		if(found)
		{
			debugWindow = (CDebugWindow*) pView;
			return debugWindow;
		}
		else
			return 0;
	}
	else
		return debugWindow;

}

Thanks in advance.

Bekir.

Weird windows problem

mihai1239-Jun-08 21:14

mihai123

9-Jun-08 21:14

Hello, I have a weird problem regarding the deleting of a folder.

I'm trying to delete a folder using this code

            TCHAR exeDirectory[MAX_PATH];
GetCurrentDirectory(sizeof(exeDirecotry) - 1, exeDirectory);
CString szStoreFolder;
            szStoreFolder.Format(_T("%s\\td10"),exeDirectory);
                        ......
                     SHFILEOPSTRUCT op;
    op.pFrom = szFolderName;
    //op.pTo = _T("");      //will be ignored
    op.wFunc = FO_DELETE;
    op.fFlags = FOF_SILENT | FOF_NOCONFIRMATION;
    op.fAnyOperationsAborted = false;
    op.hNameMappings = NULL;
    int er= SHFileOperation(&op);
    _tprintf(_T("Eroare %d "),er);

The problem is that it doesn't work every time.
It depends on the exeDirectory name and on the folder name (the folder that I'm trying to delete)

For instance if the exeDirectory is TEST and the folder name is Td10 it doesn't work. If the exeDirectory is ZIP_OPTION and the folder name TD10 it works. If the exe folder is TEST and the folder name is TemporaryData it works but now for the ZIP_OPTION folder it dosn't work.

I made a debug and the szFolder contains the correct path.

I've got the error 1026.

I tried to take the path with CFileFinder but still the same problem appears. I tried also to take the short folder name but it the same. I do not know what to do.

Any help or advice would be appreciate
Tnx

Re: Weird windows problem

Michael Schubert9-Jun-08 22:18

Michael Schubert

9-Jun-08 22:18

Why are you using GetCurrentDirectory()?
I don't know the rest of your code but there is a chance that the current directory changes after a recursive deletion with SHFileOperation or elsewhere in your code.
Also, you are mentioning 3 different variables for the path: "szStoreFolder", "szFolder" and "szFolderName". Very confusing.

Re: Weird windows problem

mihai1239-Jun-08 22:37

mihai123

9-Jun-08 22:37

problem solved
You should use the relative name to the current folder and the short name of the folder DOES NOT WORK WITH LONG FOLDER NAME.

Re: Weird windows problem

krmed10-Jun-08 1:53

krmed

10-Jun-08 1:53

I think your problem may actually be that your szStoreFolder is terminated only with a single NULL character and it should be terminated with double NULL characters.

MSDN[^]says to use fully qualified path names (not relative) - this allows the files/folders to be moved to the recycle bin.

Hope that helps.

Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

Re: Weird windows problem

mihai12310-Jun-08 3:08

mihai123

10-Jun-08 3:08

Maybe that is true. I tried to build the string like there but the code didn't delete the folder.
Anyway I want to permanently delete the folder so it is ok like it is now.

The problem was related with full path and full name of folder that I want to delete (for the folder name you must use the short name not the long one).
Anyway that was a weird problem because in 50%-60% of case the code was working fine, without any changes.

Positioning toolbar and statusbar

KASR19-Jun-08 20:24

KASR1

9-Jun-08 20:24

I have created toolbar and statusbar controls on dialog.
But if i do not call the below function the controls are not appearing.
RepositionBars(......)
I have specified the controls position too..
Please explain.

Re: Positioning toolbar and statusbar

Hamid_RT9-Jun-08 20:37

Hamid_RT

9-Jun-08 20:37

How did you make your statusbar?

Re: Positioning toolbar and statusbar

KASR19-Jun-08 20:40

KASR1

9-Jun-08 20:40

Here is the code

static UINT indicators[] =
  {
	ID_INDICATOR_COORD,           // status line indicator
	ID_INDICATOR_TIME,
  };
  .........
  .........
  m_StatusBar.Create(this);
  m_StatusBar.SetIndicators(indicators, 2);

  CRect rect;
  GetClientRect(&rect);

  m_StatusBar.SetPaneInfo(0, ID_INDICATOR_COORD, SBPS_NORMAL, rect.Width() - 100 );
  m_StatusBar.SetPaneInfo(1, ID_INDICATOR_TIME, SBPS_STRETCH, 0);
  ........
  ..........

Re: Positioning toolbar and statusbar

Hamid_RT9-Jun-08 21:40

Hamid_RT

9-Jun-08 21:40

Well use of this code and it works for you 100%.

CStatusBarCtrl m_StatusBar;

  CRect rect;
  GetClientRect(&rect);
int m_status[2]= {100, 160};
m_StatusBar.Create(WS_CHILD|WS_VISIBLE,rect, this, 0);

m_StatusBar.SetParts(2, m_status);

m_StatusBar.SetText(_T("Oh"),0,0);
m_StatusBar.SetText(_T("RSAK"), 1, 0);

Re: Positioning toolbar and statusbar

KASR19-Jun-08 20:43

KASR1

9-Jun-08 20:43

I need samples for creating toolbar in a dialogs.
link?

Re: Positioning toolbar and statusbar

Hamid_RT9-Jun-08 20:45

Hamid_RT

9-Jun-08 20:45

I think I gove you links about make statusbar,right?

Re: Positioning toolbar and statusbar

KASR19-Jun-08 20:51

KASR1

9-Jun-08 20:51

No its given by Cédric Moonen

Re: Positioning toolbar and statusbar

Hamid_RT9-Jun-08 21:08

Hamid_RT

9-Jun-08 21:08

No you wrong see here[^] its good example.

Re: Positioning toolbar and statusbar

Cedric Moonen9-Jun-08 21:12

Cedric Moonen

9-Jun-08 21:12

Why would that help him ? The status bar is used in a SDI application, not a dialog application. Furthermore, the only thing it does is displaying text, so how is it related to his problem ? Confused | :confused:

Cédric Moonen
Software developer

Charting control [v1.4]

Re: Positioning toolbar and statusbar

Hamid_RT9-Jun-08 21:18

Hamid_RT

9-Jun-08 21:18

Realy I didnt see it I saw that link of my messages.I answered to more a question about statusbar in these days so maybe my address was wrong Blush | :O

Re: Positioning toolbar and statusbar

KASR19-Jun-08 21:32

KASR1

9-Jun-08 21:32

I have added status bar using the link given by you.
Kindly share a link for adding Toolbar in a dialog.
How to display status text if i move cursor over toolbar buttons?

Re: Positioning toolbar and statusbar

Cedric Moonen9-Jun-08 21:40

Cedric Moonen

9-Jun-08 21:40

RSAK wrote:
How to display status text if i move cursor over toolbar buttons?

The search function on codeproject hasn't been disabled yet you know. Anyway, here[^] is what I've found after 20 seconds searching.

Cédric Moonen
Software developer

Charting control [v1.4]

Re: Positioning toolbar and statusbar

KASR19-Jun-08 22:38

KASR1

9-Jun-08 22:38

Actually the link which you gave for statusbar is simple, clear and easy to do also.
Thats why i requested for toolbar.

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