C / C++ / MFC

Re: Application crashes after the call onStart (msg handeler )is done.

6-Aug-08 18:01

Application crashes after the call onStart is completed.

Declaration
	virtual void OnStartPrgBar();



BEGIN_MESSAGE_MAP(MainFrame, CMDIFrameWnd)
	ON_MESSAGE(WM_USER_START_PROGRESS,OnStartPrgBar)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()



void MainFrame::OnStart()
{
 Dlg->DoModal();  // dialog is displayed and after closing the dialog app. crashes

}

Stephen Hewitt6-Aug-08 18:26

Re: Application crashes after the call onStart (msg handeler )is done.

6-Aug-08 18:26

You've given us very little to go on... Provide details such as:

The type of exception.
A stack trace to the exception.
The source code around the crash.

Steve

ptr_Electron6-Aug-08 18:37

Re: Application crashes after the call onStart (msg handeler )is done.

6-Aug-08 18:37

<code></code><pre>void MainFrame::OnStart()
{
	THREADSTRUCT5 *_param = new THREADSTRUCT5;
	_param->_this = this;
	thMPrgBar=AfxBeginThread (StartProgressBarThread, _param);
}

UINT MainFrame::StartProgressThread (LPVOID param)
{	
THREADSTRUCT5*	ts = (THREADSTRUCT5*)param;
	if (ts->_this->popupDlg->DoModal()==TRUE)
	{				
		//ts->_this->SetTimer(1,160, NULL);
	}
	return 1;
}

The crash is only in the Release mode, it is working fine in the Debug mode

Stephen Hewitt6-Aug-08 18:41

Re: Application crashes after the call onStart (msg handeler )is done.

6-Aug-08 18:41

ptr_Electron wrote:

The crash is only in the Release mode, it is working fine in the Debug mode

That doesn't mean you can't use the debugger. First enable debug information for the release build (this should always be done) then simply debug it as normal.

Steve

ptr_Electron6-Aug-08 19:36

Re: Application crashes after the call onStart (msg handeler )is done.

6-Aug-08 19:36

5F438D1A call dword ptr [edx+64h] // point of crash , pls advice

---------------------------
Microsoft Visual C++ Debug Library
---------------------------
Debug Assertion Failed!

Program: -----------------------------------.exe
File: afxcmn.inl
Line: 449

For information on how your program can cause an assertion
failure, see the Visual C++ documentation on asserts.

(Press Retry to debug the application)
---------------------------
Abort Retry Ignore
---------------------------

Stephen Hewitt6-Aug-08 19:43

Re: Application crashes after the call onStart (msg handeler )is done.

6-Aug-08 19:43

It sounds like you didn't follow my advice of enabling debug information for the release build. Also you don't mention what version of MFC you're using: there's no reason why line 449 of afxcmn.inl need to the same across different versions of MFC -- you should post the code around the line in your post. In my version of MFC it looks like this:

_AFXCMN_INLINE int CProgressCtrl::StepIt()
	{ ASSERT(::IsWindow(m_hWnd)); return (int) ::SendMessage(m_hWnd, PBM_STEPIT, 0, 0L); }

If this is the case then it looks like the window no longer exists.

Steve

David Crow7-Aug-08 3:33

David Crow

7-Aug-08 3:33

ptr_Electron wrote:
...it is working fine in the Debug mode

Doubtful. Bugs are bugs, whether in debug mode or release mode. The problem has likely just been masked by something else.

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Re: Application crashes after the call onStart (msg handeler )is done.

SandipG 6-Aug-08 20:52

SandipG

6-Aug-08 20:52

ptr_Electron wrote:
void MainFrame::OnStart()
{
Dlg->DoModal(); // dialog is displayed and after closing the dialog app. crashes

}

I think you are sending some user defined message and You are not handling WPARAM and LPARAM.
You need to define the parameters even if you are not using them. Just add these parameters and your crash in release mode will be resolved.

void MainFrame::OnStart(WPARAM wParam, LPARAM lParam)
{
 Dlg->DoModal();  // dialog is displayed and after closing the dialog app. crashes

}

Also dont forget to edit the function declaration in CMainFrame.

Regards,
Sandip.

How to include animations in MFC (vc++6.0)

Mohsin Abbas6-Aug-08 17:36

Mohsin Abbas

6-Aug-08 17:36

Hi frinds
I want to include animations in Dialog based MFC application
please help me in this matter

hassan

Re: How to include animations in MFC (vc++6.0)

ptr_Electron6-Aug-08 18:34

Re: How to include animations in MFC (vc++6.0)

6-Aug-08 18:34

You may use CAnimateCtrl. The below link may be useful

http://www.codeproject.com/KB/miscctrl/controls_avi.aspx[^]

pallaka6-Aug-08 18:35

pallaka

6-Aug-08 18:35

Check the below links
http://www.codeproject.com/KB/static/gifanimation.aspx[^]

http://www.codeproject.com/KB/GDI-plus/imageexgdi.aspx[^]

Pls Rate it.It will help us to work for better answers

LNK2001 error question

monsieur_jj6-Aug-08 17:31

6-Aug-08 17:31

Hi all,

I have this error:

1>UpdateServiceModule.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) class ATL::CStringT<wchar_t,class ATL::StrTraitATL<wchar_t,class ATL::ChTraitsCRT<wchar_t> > > __cdecl GetProductSiteCode(void)" (__imp_?GetProductSiteCode@@YA?AV?$CStringT@_WV?$StrTraitATL@_WV?$ChTraitsCRT@_W@ATL@@@ATL@@@ATL@@XZ)
1>D:\SVN\Licensin System\Work Package\UpdateManager\Debug\UpdateService.exe : fatal error LNK1120: 1 unresolved externals

I am not sure what the problem is because I have included the CaptureServerCpl.lib ung my solution and have included its directory to where the solution searches for libraries.

Please advise.

Thanks
Jayjay

Nibu babu thomas6-Aug-08 19:07

6-Aug-08 19:07

monsieur_jj wrote:
I am not sure what the problem is because I have included the CaptureServerCpl.lib ung my solution a

The error says that the linker is looking for a function which has a calling convention of __cdecl is it due to this.
Might be that your function has __stdcall but your project specifies a default calling convention of __cdecl.

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

monsieur_jj6-Aug-08 19:28

6-Aug-08 19:28

Hi Nibu,

This is how i wrote it at the dll project:

#define DLLEXPORT __declspec(dllexport)
.
.
.
.
class CJJPropertyPage5 : public CPropertyPage
{	DECLARE_DYNCREATE(CJJPropertyPage5)

// Construction
public:
DLLEXPORT CString GetProductSiteCode(void);
.
.
.

Now this is how I am calling it at my exe:

#define DLLIMPORT __declspec(dllimport)
DLLIMPORT CString GetProductSiteCode(void);

Is there a difference? what seems to be wrong?

Thanks,
Jayjay

Nibu babu thomas6-Aug-08 19:42

6-Aug-08 19:42

monsieur_jj wrote:
DLLIMPORT CString GetProductSiteCode(void);

Change this to the following...
DLLIMPORT CString __stdcall GetProductSiteCode(void);

IMO default calling convention in both projects looks different. This might be causing the problem, though this is just a guess.

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

monsieur_jj6-Aug-08 19:48

6-Aug-08 19:48

Hi Nibu,

I have tried that and this is the error i got:

1>UpdateServiceModule.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) class ATL::CStringT<wchar_t,class ATL::StrTraitATL<wchar_t,class ATL::ChTraitsCRT<wchar_t> > > __stdcall GetProductSiteCode(void)" (__imp_?GetProductSiteCode@@YG?AV?$CStringT@_WV?$StrTraitATL@_WV?$ChTraitsCRT@_W@ATL@@@ATL@@@ATL@@XZ) referenced in function "public: bool __thiscall redmap::CUpdateServiceModule::DoCheckForProductUpdates(class ns1__Update,struct redmap::RMproduct *)" (?DoCheckForProductUpdates@CUpdateServiceModule@redmap@@QAE_NVns1__Update@@PAURMproduct@2@@Z)
1>D:\SVN\Licensin System\Work Package\UpdateManager\Debug\UpdateService.exe : fatal error LNK1120: 1 unresolved externals

What looks different in both project? Is it an issue if the dll project an MFC project then the exe project is a atl/wtl project?

Nibu babu thomas6-Aug-08 19:53

6-Aug-08 19:53

monsieur_jj wrote:
// Construction
public:
DLLEXPORT CString GetProductSiteCode(void);
.

Oops you are exporting a member function, but in fact you should export the whole class, you cannot export member functions of a class selectively, either the whole class or none.

I missed that part. Frown | :(

monsieur_jj wrote:
class CJJPropertyPage5 : public CPropertyPage
{ DECLARE_DYNCREATE(CJJPropertyPage5)

class DLLEXPORT CJJPropertyPage5 : public CPropertyPage

And then import the class where you are planning to use it.

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

monsieur_jj6-Aug-08 20:00

6-Aug-08 20:00

Hi Nibu,

Do i have to rewrite the whole class?

Thanks,
Jayjay

Nibu babu thomas6-Aug-08 20:06

6-Aug-08 20:06

monsieur_jj wrote:
Do i have to rewrite the whole class?

Nah, just move DLLEXPORT to place where I've shown in my earlier post. This is what I would do for exporting and importing a class.

#if defined EXPORT_FROM_DLL
  #define DLLEXPORT __declspec( dllexport )
#else
  #define DLLEXPORT __declspec( dllimport )
#endif

class DLLEXPORT CMyPropertyPage : public CPropertyPage
{
  public: 
    // Some code
};

Make sure that you declare EXPORT_FROM_DLL in your dll project so that the class get's exported and when you include this header file in another project your class get's auto imported since EXPORT_FROM_DLL is not defined this project.

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

monsieur_jj6-Aug-08 20:27

6-Aug-08 20:27

I am a bit confused on what I should do specifically.

This is about 1/5 of the class:

#include "..\MacAddress.h"
#include "..\NetworkConnectionInformation.h"
#include "..\DeviceLocation.h"

#if defined EXPORT_FROM_DLL  
#define DLLEXPORT __declspec( dllexport )
#else  
#define DLLEXPORT __declspec( dllimport )
#endif

class CJJPropertySheet;
class DLLEXPORT CJJPropertyPage5 : public CPropertyPage
{
	DECLARE_DYNCREATE(CJJPropertyPage5)

// Construction
public:
	CString m_strURL;
	void Register(void);
	static UINT StartRegistration(LPVOID pParam);
	UINT m_uiTimer;
	CString GetProductSiteCode(void);
	CJJPropertyPage5();
	~CJJPropertyPage5();

As you can see I already added what you recommended. Now on the import side. My question is do I have to rewrite the class into one of my headers? something like:

class DLLIMPORT CJJPropertyPage5 : public CPropertyPage
{
public:

	CString GetProductSiteCode(void);
	CJJPropertyPage5();
	~CJJPropertyPage5();

From what I understood i dont have to rewrite the members that I will not use directly.

Is that right? and also do I have to include the header file of the orginal class?

Thanks,
Jayjay

Nibu babu thomas6-Aug-08 20:48

Accessing microsoft index service with ADO

6-Aug-08 20:48

monsieur_jj wrote:
My question is do I have to rewrite the class into one of my headers? something like:

Not at all. Reuse the header file. That's how classes are exported and imported.

monsieur_jj wrote:
do I have to include the header file of the orginal class?

Exactly! You don't have to rewrite the whole class declaration here.

monsieur_jj wrote:
class DLLIMPORT CJJPropertyPage5

Don't change DLLEXPORT to DLLIMPORT. Of course the naming is confusing, better rename DLLEXPORT to DLL_EXPORT_IMPORT.

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

tustin6-Aug-08 14:09

tustin

6-Aug-08 14:09

Hi Guys,

I am working on a desktop search engine.
Trying to access the Microsoft Index service catalog using ADO's,I am able to connect to the Catalog and Query it.

CommandText = "select filename,vpath from scope() where FREETEXT(Contents, '" + str + "') order by rank desc ";

strContent = (char *) (_bstr_t) pRecordset->Fields->GetItem ("filename")->Value;
the above gives me the file name

but the below access to the vpath failes.
strContent = (char *) (_bstr_t) pRecordset->Fields->GetItem ("vpath")->Value;

can any one give me some suggestions on this so that i can get the vpath to a CString.

Thanks.

LPITEMIDLIST

Bram van Kampen6-Aug-08 13:17

Bram van Kampen

6-Aug-08 13:17

Is there a direct method of handeling items returned from SHGetSpecialFolderLocation(...). At the moment I am converting them into a path with SHGetPathFromIDList(...), to continue with CreateFile(...) etc. It seems to me an awfull lot of wasted efford by microsoft if an LPITEMIDLIST was only usefull as a halfway house to creating a path that you can actually work with.

Regards,
Smile | :)

Bram van Kampen

Re: LPITEMIDLIST

Stephen Hewitt6-Aug-08 14:04