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AfxIsValidAddress in VS6 calls IsBadReadPtr or IsBadWritePtr depending on whether bReadWrite is FALSE or TRUE respectively. However, it's been discovered in the last few years that these APIs are seriously flawed. See IsBadXxxPtr should really be called CrashProgramRandomly[^] for details.
Visual Studio .NET 2003 still calls IsBadXxxPtr in Debug builds, but in Release builds only checks for NULL. In Visual Studio 2005, the IsBadXxxPtr checks are completely removed, the function only checks for NULL.
It does look like you've called through a bad pointer - this could well mean that the virtual function pointer inside CMyData is NULL, which it will be if you used memset, for example.
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There is no way to check if an actual non-null pointer is valid!
You might want to look at MSDN and read the remake section or learn the limitation of AfxIsValidAddress
Yours Truly, The One and Only!
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I have found a way to connect visual c++ into MS-access database using ADODC (in active x control), but i don't know how to update, insert, or delete recordset from the database.. does anyone have the code to access the records?? please help me out, I need this for my thesis 
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i have used map in my program and i m getting these type of warnings
e:\program files\microsoft visual studio\vc98\include\xtree(182) : warning C4786: 'std::_Tree<int,std::pair<int const ,CErrorNotifications *>,std::map<int,CErrorNotifications *,std::less<int>,std::allocator<CErrorNotifications *> >::_Kfn,std::less<i
nt__^,std::allocator<cerrornotifications *=""> >::~_Tree<int,std::pair<int const ,CErrorNotifications *>,std::map<int,CErrorNotifications *,std::less<int>,std::allocator<CErrorNotifications *> >::_Kfn,std::less<int>,std::allocator<CErrorNotifications *>
>' : identifier was truncated to '255' characters in the debug information
e:\program files\microsoft visual studio\vc98\include\xtree(162) : warning C4786: 'std::_Tree<int,std::pair<int const ,CErrorNotifications *>,std::map<int,CErrorNotifications *,std::less<int>,std::allocator<CErrorNotifications *> >::_Kfn,std::less^__i
nt>,std::allocator<CErrorNotifications *> >::_Tree<int,std::pair<int const ,CErrorNotifications *>,std::map<int,CErrorNotifications *,std::less<int>,std::allocator<CErrorNotifications *> >::_Kfn,std::less<int>,std::allocator<CErrorNotifications *> >
' : identifier was truncated to '255' characters in the debug information
e:\program files\microsoft visual studio\vc98\include\xtree(374) : warning C4786: '__unwindfunclet$?erase@?$_Tree@HU?$pair@$$CBHPAVCErrorNotifications@@@std@@U_Kfn@?$map@HPAVCErrorNotifications@@U?$less@H@std@@V?$allocator@PAVCErrorNotifications@@@3
@@2@U?$less@H@2@V?$allocator@PAVCErrorNotifications@@@2@@std@@QAE?AViterator@12@V312@0@Z$0' : identifier was truncated to '255' characters in the debug information
e:\program files\microsoft visual studio\vc98\include\xtree(236) : warning C4786: '__ehhandler$?insert@?$_Tree@HU?$pair@$$CBHPAVCErrorNotifications@@@std@@U_Kfn@?$map@HPAVCErrorNotifications@@U?$less@H@std@@V?$allocator@PAVCErrorNotifications@@@3@@2
@U?$less@H@2@V?$allocator@PAVCErrorNotifications@@@2@@std@@QAE?AU?$pair@Viterator@?$_Tree@HU?$pair@$$CBHPAVCErrorNotifications@@@std@@U_Kfn@?$map@HPAVCErrorNotifications@@U?$less@H@std@@V?$allocator@PAVCErrorNotifications@@@3@@2@U?$less@H@2@V?$alloc
ator@PAVCErrorNotifications@@@2@@std@@_N@2@ABU?$pair@$$CBHPAVCErrorNotifications@@@2@@Z' : identifier was truncated to '255' characters in the debug information
e:\program files\microsoft visual studio\vc98\include\xtree(236) : warning C4786: '__unwindfunclet$?insert@?$_Tree@HU?$pair@$$CBHPAVCErrorNotifications@@@std@@U_Kfn@?$map@HPAVCErrorNotifications@@U?$less@H@std@@V?$allocator@PAVCErrorNotifications@@@
3@@2@U?$less@H@2@V?$allocator@PAVCErrorNotifications@@@2@@std@@QAE?AU?$pair@Viterator@?$_Tree@HU?$pair@$$CBHPAVCErrorNotifications@@@std@@U_Kfn@?$map@HPAVCErrorNotifications@@U?$less@H@std@@V?$allocator@PAVCErrorNotifications@@@3@@2@U?$less@H@2@V?$a
llocator@PAVCErrorNotifications@@@2@@std@@_N@2@ABU?$pair@$$CBHPAVCErrorNotifications@@@2@@Z$0' : identifier was truncated to '255' characters in the debug information
e:\program files\microsoft visual studio\vc98\include\utility(21) : warning C4786: 'std::pair<std::_Tree<int,std::pair<int const ,CErrorNotifications *>,std::map<int,CErrorNotifications *,std::less<int>,std::allocator<CErrorNotifications *> >::_Kfn,
std::less<int>,std::allocator<CErrorNotifications *> >::iterator,bool>::pair<std::_Tree<int,std::pair<int const ,CErrorNotifications *>,std::map<int,CErrorNotifications *,std::less<int>,std::allocator<CErrorNotifications *> >::_Kfn,std::less<int>,st
please anybosy can help me in removing these warnings.....
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#pragma warning( disable : 4786 )
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
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#pragma can remove warning from Output window, but find the cause and solving if possible could be better.
Best Regards,
Suman
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Oh, you cannot. And you don't need to worry about: the warning simply states that the identifiers will be truncated in the debug info. But this is inavoidable since there is a 255-characters limit for identifiers in debug information and, on the other hand, STL templates produce very long identifiers. Bottom line you can safely ignore that warnings.
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
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thanks for your replys...
now my problem is i have made various ui threads before starting these thread i have checked using this code whether they are running or not..
std::map<int, CSmtpThread*>::iterator pos = assocs_Smtp.find(l);
if(pos == assocs_Smtp.end())
{
StartingSmtpThread(URL,l,total_timeinterval,prt,Task_Nm);
}
}
and i have closed my thread using this code
std::map<int, CSmtpThread*>::iterator pos = assocs_Smtp.find(smtpkey);
if(pos != assocs_Smtp.end())
{
CSmtpThread* pThread = pos->second;
pThread->PostThreadMessage(WM_QUIT,NULL,NULL);
}
once i start thread it works fine, when i stop it try to start it it doen't work.It doesn't go inside if condition...
how to solve this problem...
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Because (as far as I can guess...), once you stopped the thread, you have to remove it from the map.
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
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how to remove them from map
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Thanks this solved my problem....
now one more problem i m having that when these ui threads give me result i send the output to my main window to print it in my list control using SendMessage. like this
if (m_pLogWnd)
{
pasiin_val obj_val;
obj_val.index = test_int;
obj_val.url = test_str;
obj_val.task_n = test_task_name;
m_pLogWnd->SendMessage(LOGMSG, (WPARAM)(CString*)&logmsg, (LPARAM)(&obj_val));
}
m_pLogWnd is been assigned with this of my main window...
now my first problem is when i start and stop my thread various times it gives abort assertion failed error sometimes in wincore.cpp in line 980 and sometimes in afxwin2.inl and it sometimes also say that refrenced memory cannot be accessed..
and second after stopping my thread in some threads it shows output value...
how to resolve it...
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Oh I see, Thanks for your help and explanation!!
Other than code, there is one more option to disable the warning:
In Project Menu --> Project Properties --> C/C++ --> Advanced --> Disable Specific Warnings, we can specify a warning number to be suppressed as follows:
/wdn Disables the specified compiler warning where n is the compiler warning number.
For example,
/wd4786 disables compiler warning C4786.
Best Regards,
Suman
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CPallini wrote: Well, I don't disable warnings: they make me feel less alone
Well - I know this feeling:
The compiler is the only one who understands me at least sometimes. 
Failure is not an option - it's built right in.
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Hi!! You're not alone!! Me too never disable but solve warnings only if it is necessary.
Warnings are one of my companion!!
Best Regards,
Suman
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To print data from my CFormView, I am using MFC Print architecture (OnPreparePrinting, OnBeginPrinting, OnEndPrinting etc.) . OnPrint manages printing (and OnDraw for screen). On Dot-matrix printer, need to print 3 or 4 text-invoices one by one (one below another), on one A4 size paper (data is from CFormView).
How/Where to set paper size (height) to say 2.55 inches, so that I can print single invoice without ejecting A4 paper (on Dot-Matrix printer).
If possible, I wish to use MFC Doc-View Print architecture otherwise Win32 printing.
Please help me with some code-snippet.
Thanks for any help
Ana
Ana_v123
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Check the following code project article
http://www.codeproject.com/printing/printerorientation.asp
I hope it helps
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The following is a code snippet for checking the subdirectories.
This code is crashing in the highligted line when sStr is "C:\".If it is "D:\" or "E:" it is working.
void CBatchPrintDlg::ChkForSubDir( CString sStr, HTREEITEM hTree )
{
struct _finddata_t c_file;
long hFile;
::SetCurrentDirectory((LPCTSTR)sStr);
if( (hFile = _findfirst( "*.*", &c_file )) != -1L )
{
if ( IsDirectory ( c_file.attrib ) )
InsertItemTOTree( (LPCTSTR)c_file.name, hTree );
//m_tree.InsertItem((LPCTSTR)c_file.name, hTree );
while( _findnext( hFile, &c_file ) == 0 )
{
if ( IsDirectory ( c_file.attrib ) )
{
InsertItemTOTree( (LPCTSTR)c_file.name, hTree );
//m_tree.InsertItem((LPCTSTR)c_file.name, hTree );
//break;
}
}
_findclose( hFile );
}
}
Please help.
Thanks.
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sheetal_06 wrote: "C:\".If it is "D:\" or "E:"
Do all of these have subdirectories ?
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ya all have sub directories.
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Since you are using MFC, why not utilize CFileFind? It's much cleaner. What exactly is your code supposed to be doing? There's no need to call SetCurrentDirectory().
"A good athlete is the result of a good and worthy opponent." - David Crow
"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne
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Are you sure sStr is C:\ when you got error and also why you dont use of value return of SetCurrentDirectory?
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Hi all,
I'nm trying to read the data in a UDL file, but I think it is binary(despite being readable in Notepad), and all my attempts to read one has failed, generally getting some gibberish such as "y;[" and a load of blank spaces.
Can anyone help me in this regards
Many Thanks
Regards,
-- modified at 4:43 Thursday 19th July, 2007
The only programmers that are better that C programmers are those who code in 1's and 0's ![Green Alien | [Alien]](https://codeproject.freetls.fastly.net/script/Forums/Images/alien.gif)
 Programm3r
My Blog: ^_^
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