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Could you please post the entire code snippet of your InitInstance() function? There is no chance for a vector to be in a mfc wizard generated InitInstance(). I think some other code block of your's is causing the problem.
Well, while posting code, please enclose in "code block" so that the it will be easier to read.
Regards,
Jijo.
_____________________________________________________
http://weseetips.com[ ^] Visual C++ tips and tricks. Updated daily.
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jimjim733 wrote: when this is run an unhandled exception occurs
And if you remove the code, does the error go away?
Yes I realize you need sockets initialized but that is a secondary problem.
"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
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Yeap, it goes away.
Here is a copy of the InitInstance
Cheers
Jim
BOOL CMyApp::InitInstance()
{
#ifdef _AFXDLL
Enable3dControls();
#else
Enable3dControlsStatic();
#endif
WSADATA wsaData;
int iResult = WSAStartup(MAKEWORD(2,2),&wsaData);
if (iResult != NO_ERROR) {
OutputDebugString("Error at WSAStartup()\r\n");
}
CMyDlg dlg;
m_pMainWnd = &dlg;
int nResponse = dlg.DoModal();
if (nResponse == IDOK)
{
}
else if (nResponse == IDCANCEL)
{
}
return FALSE;
}
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I can't see what's causing the exception, but is
there a reason you're not calling the base class
InitInstance()?
Mark
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://www.codeproject.com/script/Forums/Images/coffee.gif)
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Sorry, not sure I follow....that is the base class of the project....isn't it?
Am I missing something here?
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jimjim733 wrote: that is the base class of the project....isn't it?
Maybe it is (I can't see the header file) but it looks so much like
an MFC CWinApp/CWinAppEx InitInstance() override that I assumed it was 
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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ok, so what do I need to do?
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Something like this:
BOOL CMyApp::InitInstance()
{
if (!CWinApp::InitInstance())
return FALSE;
#ifdef _AFXDLL
Enable3dControls();
#else
Enable3dControlsStatic();
#endif
...
Not all base class implementations of virtual functions do anything
but there is a little code in CWinApp::InitInstance() that may or may
not be important.
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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No, that didn't work
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What does "didn't work" mean?
I didn't expect it to fix the exception - i only pointed
out the fact that it was missing and wondered if there
was a reason.
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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Sorry, just thought that might have fixed it.
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When the exception is thrown, what does the call stack look like?
"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
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not sure what I am looking for???
Jim
std::vector<UnitInfoStruct *,std::allocator<UnitInfoStruct *> >::size() line 114 + 15 bytes
CAlinksRemoteControl::ScanForUnits() line 480 + 14 bytes
CMultiVueDlg::OnInitDialog() line 130
AfxDlgProc(HWND__ * 0x00240334, unsigned int 272, unsigned int 3081096, unsigned int 3081096) line 35 + 14 bytes
USER32! 7e418734()
USER32! 7e42413c()
USER32! 7e423b30()
USER32! 7e43e599()
USER32! 7e418734()
USER32! 7e418816()
USER32! 7e42a013()
USER32! 7e42a998()
CWnd::DefWindowProcA(unsigned int 272, unsigned int 3081096, long 0) line 1000 + 32 bytes
CWnd::Default() line 249
CDialog::HandleInitDialog(unsigned int 3081096, unsigned int 3081096) line 624 + 8 bytes
CWnd::OnWndMsg(unsigned int 272, unsigned int 3081096, long 0, long * 0x0012f800) line 1815 + 17 bytes
CWnd::WindowProc(unsigned int 272, unsigned int 3081096, long 0) line 1585 + 30 bytes
AfxCallWndProc(CWnd * 0x0012fc08 {CMultiVueDlg hWnd=???}, HWND__ * 0x00240334, unsigned int 272, unsigned int 3081096, long 0) line 215 + 26 bytes
AfxWndProc(HWND__ * 0x00240334, unsigned int 272, unsigned int 3081096, long 0) line 368
AfxWndProcBase(HWND__ * 0x00240334, unsigned int 272, unsigned int 3081096, long 0) line 220 + 21 bytes
USER32! 7e418734()
USER32! 7e418816()
USER32! 7e42927b()
USER32! 7e42651a()
USER32! 7e42683e()
USER32! 7e439b43()
CWnd::CreateDlgIndirect(const DLGTEMPLATE * 0x0042b540, CWnd * 0x00000000 {CWnd hWnd=???}, HINSTANCE__ * 0x00400000) line 327 + 36 bytes
CDialog::DoModal() line 531 + 32 bytes
CMultiVueApp::InitInstance() line 71 + 11 bytes
AfxWinMain(HINSTANCE__ * 0x00400000, HINSTANCE__ * 0x00000000, char * 0x00151f0c, int 1) line 39 + 11 bytes
WinMain(HINSTANCE__ * 0x00400000, HINSTANCE__ * 0x00000000, char * 0x00151f0c, int 1) line 30
WinMainCRTStartup() line 330 + 54 bytes
KERNEL32! 7c817067()
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jimjim733 wrote: not sure what I am looking for???
It looks as though your code gets all the way into OnInitDialog() before the exception is thrown.
"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
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Like David said, you seem to get as far as to OnInitDialog.
Is it possible that the code using the vector doesn't run if the socket lib hasn't been initialized?
That could explain why the error "goes away" if you omit the call to WSAStartup.
To me it looks like the std::vector<UnitInfoStruct*> vector has not been created properly since vector::size() only operates on internal data and doesn't change anything.
Could it be that the vector variable is a pointer that you haven't allocated memory for?
Just guessing, but it could be worth checking...
"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown
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Okay, thanks.....i'll take a look
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okay, can you help?
I am not sure how to do this
Below are the only references I have for UnitInfoStruct
struct UnitInfoStruct *pUnit = NULL;
pUnit = new struct UnitInfoStruct;
vector<struct UnitInfoStruct *> m_vszIPAddr;
struct UnitInfoStruct {
char szIPAddr[16];
char szSer[9];
};
As you can tell, I am struggling with this a bit.
Jim
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Ok, it's the m_vszIPAddr variable I'm suspicious about, or rather its container since the variable itself is not a pointer.
The reason why I think this is suspicious is you get an access violation, which usually means a pointer referencing out-of-bounds memory e.g. a very low address.
Since you get the assertion inside the std::vector::size() function, which only operates on internal operators that doesn't reference memory outside the vector elements if initialized properly, my guess is that somehow the vector has not been initialized properly.
As the vector itself is not a pointer, it should be initialized when its container is created and that's why I'm curious about the container.
In your CAlinksRemoteControl::ScanForUnits() you must access the vector in some way, probably calling push_back() to add a new "unit".
I would also like to see the code for allocating memory for a new "unit", how data is assigned to it and how it is inserted into the vector.
"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown
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One thing I have tried is moving the WSAStartup to the main initDialog function and the app goes through. Any ideas????
jim
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jimjim733 wrote: Any ideas?
Nope.
I suggest you follow the call chain into ScanForUnits() from OnInitDialog() in debug mode. Verify that all objects operated on are created properly.
"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown
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Hi,
I am using tab control in my dialog application. I need to change the background color for the tabs. I wrote DrawItem metho in CTabCtrl derived class. But the tab color is not changing. Please help me.
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do you well defined the code snippet? what programming language is that?
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Maito Gai wrote: what programming language is that?
C++/MFC
Somethings seem HARD to do, until we know how to do them.
 _AnShUmAn_
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aaaaaaoooooooouuuuccccchhhhh there's so many forums I've replied to some tips here.... from diff sections and I've forgot it is in C++/MFC section
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Maito Gai wrote: so many forums
 which forums!
Maito Gai wrote: from diff sections and I've forgot it is in C++/MFC section
A title is present at the top of the page for every forum, please do read it next time onwards. and the number of messages posted by you reads 9 in ur profile out of which 2 belong to this thread 
Somethings seem HARD to do, until we know how to do them.
_AnShUmAn_
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