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From: JRGlide on 9 May 2008 13:16
I have been struggling several weeks with this problem. I need to call an MFC
dll from a non-MFC application. The MFC dll was originally a working MFC
program that I conveted to a dll. The dll works fine except that it crashes
when I exit.

Can anyone provide me with some snippets of working code showing how you did
this? An example of the calling code, the CWinApp (or at least the
InitInstance) and the hook function would be great. I have read several
times that this should be easy to do, so I am probably just missing a simple
line somewhere.

The way I created my dll is to use to App Wizard to create an MFC dll. Then
I simply added my working application code to the dll skeleton code, and
added a 'C' hook function to CWinApp that can be called from the outside.

Today I decided to go back to basics, so I created a simple Doc/View
application using the wizard. I then converted that to a dll and I had the
same problem - it crashed when exiting.

Any help would be greatly appreciated. In case it matters, I am using
Visual C++ 6.0 and and want to statically link into the MFC library.

Thank you,

Jim
From: David Ching on 9 May 2008 13:59
"JRGlide" <JRGlide(a)discussions.microsoft.com> wrote in message
news:2C839E5C-F0B1-40A5-9EBC-BE6890A54B7B(a)microsoft.com...
>I have been struggling several weeks with this problem. I need to call an
>MFC
> dll from a non-MFC application. The MFC dll was originally a working MFC
> program that I conveted to a dll. The dll works fine except that it
> crashes
> when I exit.
>
> Can anyone provide me with some snippets of working code showing how you
> did
> this? An example of the calling code, the CWinApp (or at least the
> InitInstance) and the hook function would be great. I have read several
> times that this should be easy to do, so I am probably just missing a
> simple
> line somewhere.
>
> The way I created my dll is to use to App Wizard to create an MFC dll.
> Then
> I simply added my working application code to the dll skeleton code, and
> added a 'C' hook function to CWinApp that can be called from the outside.
>
> Today I decided to go back to basics, so I created a simple Doc/View
> application using the wizard. I then converted that to a dll and I had
> the
> same problem - it crashed when exiting.
>
> Any help would be greatly appreciated. In case it matters, I am using
> Visual C++ 6.0 and and want to statically link into the MFC library.
>

Please show the stack trace where it crashes on exit.

-- David


From: JRGlide on 9 May 2008 15:23

> Please show the stack trace where it crashes on exit.

Thank you for answering, David. Here is the stack trace. BTW, I noticed on
another post where you said you had done this lots of times. Do you think
you could include some sample code?

Thank you in advance,

Jim

STACK TRACE

CFrameWnd::OnClose() line 829 + 8 bytes
CWnd::OnWndMsg(unsigned int 16, unsigned int 0, long 0, long * 0x0012f2f8)
line 1825
CWnd::WindowProc(unsigned int 16, unsigned int 0, long 0) line 1585 + 30 bytes
AfxCallWndProc(CWnd * 0x008b1320 {CWnd hWnd=0xdddddddd}, HWND__ *
0x00100338, unsigned int 16, unsigned int 0, long 0) line 215 + 26 bytes
AfxWndProc(HWND__ * 0x00100338, unsigned int 16, unsigned int 0, long 0)
line 368
USER32! 77d48709()
USER32! 77d487eb()
USER32! 77d4b368()
USER32! 77d4b3b4()
NTDLL! 7c90eae3()
USER32! 77d4e010()
UXTHEME! 5ad73c20()
UXTHEME! 5ad8e300()
UXTHEME! 5ad71ac7()
UXTHEME! 5ad7367a()
USER32! 77d4e02b()
USER32! 77d48709()
USER32! 77d487eb()
USER32! 77d4c00e()
USER32! 77d4e366()
CWnd::DefWindowProcA(unsigned int 274, unsigned int 61536, long 13370660)
line 1000 + 32 bytes
CWnd::Default() line 249
CWnd::OnSysCommand(unsigned int 61536, unsigned int 61536) line 418 + 15 bytes
CFrameWnd::OnSysCommand(unsigned int 61536, long 13370660) line 1046
CWnd::OnWndMsg(unsigned int 274, unsigned int 61536, long 13370660, long *
0x0012f884) line 1849
CWnd::WindowProc(unsigned int 274, unsigned int 61536, long 13370660) line
1585 + 30 bytes
AfxCallWndProc(CWnd * 0x008b1320 {CWnd hWnd=0xdddddddd}, HWND__ *
0x00100338, unsigned int 274, unsigned int 61536, long 13370660) line 215 +
26 bytes
AfxWndProc(HWND__ * 0x00100338, unsigned int 274, unsigned int 61536, long
13370660) line 368
USER32! 77d48709()
USER32! 77d487eb()
USER32! 77d4b368()
USER32! 77d4b3b4()
NTDLL! 7c90eae3()
USER32! 77d4b7ab()
UXTHEME! 5ad9881f()
UXTHEME! 5ad71ac7()
UXTHEME! 5ad7367a()
USER32! 77d4e02b()
USER32! 77d48709()
USER32! 77d487eb()
USER32! 77d4c00e()
USER32! 77d4e366()
CWnd::DefWindowProcA(unsigned int 161, unsigned int 20, long 13370660) line
1000 + 32 bytes
CWnd::WindowProc(unsigned int 161, unsigned int 20, long 13370660) line 1586
+ 26 bytes
AfxCallWndProc(CWnd * 0x008b1320 {CWnd hWnd=0xdddddddd}, HWND__ *
0x00100338, unsigned int 161, unsigned int 20, long 13370660) line 215 + 26
bytes
AfxWndProc(HWND__ * 0x00100338, unsigned int 161, unsigned int 20, long
13370660) line 368
USER32! 77d48709()
USER32! 77d487eb()
USER32! 77d489a5()
USER32! 77d4bccc()
CWinThread::PumpMessage() line 846
CWinThread::Run() line 480 + 11 bytes
CWinApp::Run() line 400
ViewPointCloud() line 48
main(int 1, char * * 0x00d20e60) line 68 + 8 bytes
mainCRTStartup() line 206 + 25 bytes
KERNEL32! 7c816d4f()


From: Ajay Kalra on 9 May 2008 21:10
On May 9, 1:16 pm, JRGlide <JRGl...(a)discussions.microsoft.com> wrote:
> I have been struggling several weeks with this problem. I need to call an MFC
> dll from a non-MFC application. The MFC dll was originally a working MFC
> program that I conveted to a dll. The dll works fine except that it crashes
> when I exit.
>
> Can anyone provide me with some snippets of working code showing how you did
> this? An example of the calling code, the CWinApp (or at least the
> InitInstance) and the hook function would be great. I have read several
> times that this should be easy to do, so I am probably just missing a simple
> line somewhere.
>
> The way I created my dll is to use to App Wizard to create an MFC dll. Then
> I simply added my working application code to the dll skeleton code, and
> added a 'C' hook function to CWinApp that can be called from the outside.
>
> Today I decided to go back to basics, so I created a simple Doc/View
> application using the wizard. I then converted that to a dll and I had the
> same problem - it crashed when exiting.
>
> Any help would be greatly appreciated. In case it matters, I am using
> Visual C++ 6.0 and and want to statically link into the MFC library.
>
> Thank you,
>
> Jim


What sort of DLL is it? Regular or MFC Extension. It should be a
Regular DLL and you should use AFX_MANAGE_STATE to change the state as
needed.

---
Ajay
From: JRGlide on 9 May 2008 21:42
> What sort of DLL is it? Regular or MFC Extension. It should be a
> Regular DLL and you should use AFX_MANAGE_STATE to change the state as
> needed.
>
> ---
> Ajay
>

Thank you for responding Ajay. Yes, I am using a regular dll since I need
to call it from a non-MFC program. From what I understand, I only need the
AFX_MANAGE_STATE if I am linking to MFC dynamically. But just to be sure I
have it in anyway, but it doesn't help. It crashes with or without it. Here
is the code with the hook function to the application and InitInstance. I
tried to strip it down as much as possible. Anybody see anything that looks
fishy?

Thank you.



/////////////////////////////////////////////////////////////////////////////
// The one and only CViewPointCloudApp object

CViewPointCloudApp theApp;


extern "C" {

__declspec(dllexport) void ViewPointCloud (void);

void ViewPointCloud (void)
{
AFX_MANAGE_STATE (AfxGetStaticModuleState());
theApp.Run();
}
} // extern "C"



BOOL CViewPointCloudApp::InitInstance()
{
CWinApp::InitInstance();

AfxEnableControlContainer();

// Change the registry key under which our settings are stored.
// TODO: You should modify this string to be something appropriate
// such as the name of your company or organization.
SetRegistryKey(_T("Local AppWizard-Generated Applications"));

LoadStdProfileSettings(); // Load standard INI file options (including MRU)

// Register the application's document templates. Document templates
// serve as the connection between documents, frame windows and views.

CSingleDocTemplate* pDocTemplate;
pDocTemplate = new CSingleDocTemplate(
IDR_MAINFRAME,
RUNTIME_CLASS(CViewPointCloudDoc),
RUNTIME_CLASS(CMainFrame), // main SDI frame window
RUNTIME_CLASS(CViewPointCloudView));
AddDocTemplate(pDocTemplate);

// Parse command line for standard shell commands, DDE, file open
CCommandLineInfo cmdInfo;
ParseCommandLine(cmdInfo);

// Dispatch commands specified on the command line
if (!ProcessShellCommand(cmdInfo))
return FALSE;

// The one and only window has been initialized, so show and update it.
m_pMainWnd->ShowWindow(SW_SHOW);
m_pMainWnd->UpdateWindow();

return TRUE;
}



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