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Hi everyone,
I am programming an application which pretends to work under Xp and vista using getAdaptersAddresses function. This function returns code 13 everytime i call it(only in Vista). The following code already works under XP but fails in Vista. I would appreciate any help or tip. Thank you in advance.
{
PIP_ADAPTER_ADDRESSES adapterAddresses = NULL;
PIP_ADAPTER_ADDRESSES adapterAddress = NULL;
DWORD ret = 0;
ULONG len = 0;
len = sizeof (IP_ADAPTER_ADDRESSES);
adapterAddresses = (IP_ADAPTER_ADDRESSES*) malloc(len);
if (adapterAddresses == NULL) {
// Don't care about return value
return INADDR_ANY;
}
// Try to get the size. It is not modified under vista.....
if ((ret=GetAdaptersAddresses(AF_INET, GAA_FLAG_INCLUDE_PREFIX , NULL, adapterAddresses, &len)) == ERROR_BUFFER_OVERFLOW){
// This should happen....
MessageBox(NULL,L"RESERVING",L"LLL",MB_OK);
free(adapterAddresses);
adapterAddresses = (IP_ADAPTER_ADDRESSES*) malloc(len);
if (adapterAddresses == NULL){
return INADDR_ANY;
}
}
// Check return value.
switch(ret){
case NO_ERROR :MessageBox(NULL,L"AdapterAddress OK!!", L"Enter Interfaces", MB_OK);break;
case ERROR_ADDRESS_NOT_ASSOCIATED :MessageBox(NULL,L"AdapterAddress FAILED!!-NO ADDRESS ASSOCIATED", L"Enter Interfaces", MB_OK);break;
case ERROR_BUFFER_OVERFLOW :MessageBox(NULL,L"AdapterAddress FAILED!!-OVERFLOW", L"Enter Interfaces", MB_OK);break;
case ERROR_INVALID_PARAMETER :MessageBox(NULL,L"AdapterAddress FAILED!!- PARAMETERS", L"Enter Interfaces", MB_OK);break;
case ERROR_NOT_ENOUGH_MEMORY :MessageBox(NULL,L"AdapterAddress FAILED!!- NO MEMORY", L"Enter Interfaces", MB_OK);break;
case ERROR_NO_DATA :
MessageBox(NULL,L"AdapterAddress FAILED!!- NO DATA", L"Enter Interfaces", MB_OK);break;
default :
{
LPVOID MsgBuf;
if (FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
ret,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPTSTR) &MsgBuf,
0,
NULL ))
MessageBox(NULL,(LPCWSTR)MsgBuf,L"ERROR ADAPTER 1",MB_OK);
WCHAR aux[100];
wsprintf(aux,L"Len %d - ret %d",len,ret);
MessageBox(NULL,aux,L"data",MB_OK);
}
break;
}
ret = GetAdaptersAddresses(AF_INET, GAA_FLAG_INCLUDE_PREFIX, NULL, adapterAddresses, &len);
// Check return value
switch(ret){
case NO_ERROR :MessageBox(NULL,L"AdapterAddress OK!!", L"Enter Interfaces", MB_OK);break;
case ERROR_ADDRESS_NOT_ASSOCIATED :MessageBox(NULL,L"AdapterAddress FAILED!!-NO ADDRESS ASSOCIATED", L"Enter Interfaces", MB_OK);break;
case ERROR_BUFFER_OVERFLOW :MessageBox(NULL,L"AdapterAddress FAILED!!-OVERFLOW", L"Enter Interfaces", MB_OK);break;
case ERROR_INVALID_PARAMETER :MessageBox(NULL,L"AdapterAddress FAILED!!- PARAMETERS", L"Enter Interfaces", MB_OK);break;
case ERROR_NOT_ENOUGH_MEMORY :MessageBox(NULL,L"AdapterAddress FAILED!!- NO MEMORY", L"Enter Interfaces", MB_OK);break;
case ERROR_NO_DATA :
MessageBox(NULL,L"AdapterAddress FAILED!!- NO DATA", L"Enter Interfaces", MB_OK);break;
default :
{
LPVOID MsgBuf;
// printf("Call to GetAdaptersAddresses failed.\n");
if (FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
ret,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
(LPTSTR) &MsgBuf,
0,
NULL ))
MessageBox(NULL,(LPCWSTR)MsgBuf,L"ERROR ADAPTER",MB_OK);
WCHAR aux[100];
wsprintf(aux,L"Len %d - ret %d",len,ret);
MessageBox(NULL,aux,L"data 2 ",MB_OK);
}
break;
}
// Function continues....
}
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I have solved the issue. It is none related with the code but with iphlpapi.dll file. In windows vista this file is smaller for some reason, and using it instead of the one added by vs2008 (from windows xp) fixes this error.
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Hector_M wrote: In windows vista this file is smaller for some reason, and using it instead of the one added by vs2008
The DLL comes with the operating system, not VS.
What gave you the idea you needed to redistribute it?
I hope you aren't doing that with other system DLLs. 
Mark
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/coffee.gif)
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Emmm, sorry there must be some errors in my answer. Of course i know that iphlpapi comes with the operative system, in fact is in windows/system32 directory, what i tried to say is that vs2008 included this file in my setup project, because it detects a dependency with it. So, when i installed my installation package in windows vista i discovered that iphlpapi was quite different from the one in winXP and cause my app to crash, what was amazing for me, since systems should be compatible backwards...although microsoft has its own rules.... .
The only doubt about that is the differences between those files, and i ask myself if the group of functions "GetAdapterInfo" has been removed definitely, and the problems with backwards compatibility.
Apart from that, thanks for answering.
Hector.
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Hector_M wrote: vs2008 included this file in my setup project, because it detects a dependency with it.
Well that is redistributing it, isn't it? Does your
setup place it on the destinatioon machine? If so, that's
wrong, and it should be removed from your setup.
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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Emmm sorry once again, with "and using it instead of the one added by vs2008 (from windows xp) fixes this error" (on the first reply) i meant that i excluded it from my project, and let the OS look for its own iphlpapi.dll,but in any case, thanks a lot for your answers.
Hector
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Hector_M wrote: ...and using it instead of the one added by vs2008 (from windows xp) fixes this error.
Or masks it.
"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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Hallo
i used in my app to open a file by browsing open Dialog box. After that i want to
create a text file in my application directory using '..\\' notation. Like
fp = fopen("..\\MyApp\\Temp\\Something.txt","w");
Can it possible to create a file in my app directory using '..\\' this type of notation.
Thanks
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Sk Mohiuddin wrote: After that i want to
create a text file in my application directory using '..\\' notation
Your notation depends on the current directory. How do you know where it points to at the moment?
There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal
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Yes you can. But, as already pointed out by sashoalm, there must exist the folder MyApp\Temp inside the application current directory.
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.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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Thanks for the Suggestion
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I am writing block which throws com exception and i have written code in following way.
GetDate() & SetDate(d) both throws exception.
Date d;
try
{
// Many statements can throws exception
d = GetDate();
SetDate(somedate);
// calculate some "value"
}
catch(_com_exception &)
{
// set value = 0;
}
try
{
SetDate(d); // reset date
}
catch(_com_exception &)
{
// set value = 0;
}
Even if both block throws same exception i cant put them in one try for the reason that in any case either it throws exception or not i want to reset date at the end.
Is this code looks good with consideration of good coding practices?
Thanks,
Perry
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Well, in my opinion it depends on the goal of your app, since at least for me,it is good to make fully diference between every error code, and in your app. it seems that the situations are different, so for me this is good since personally, i hate long "if"/"try-catch" statements.
regards,
Hector.
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I may be wrong, but Exceptions seem to me to be an unexpected error (out of bounds memory, couldn't allocate enough memory, divide by zero), while something like HRESULT return value schemes tend to look for and handle expected errors.
So to answer whether or not using try{}catch{} is good practice, you have to explain (to yourself or to us) why you're using them. Sorry for the generic answer, but coding is all about using the right tool for the job, just like anything else - otherwise you end up in this forum too often.[^]
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I am creating one project in which my client is "MFC dialog based"( "exe" ) and dll is "MFC dll".
In MFC dll there is one dialog box that is access by Client application. This is done with the help of exported function but when in this exported function i use domodal than it crashes and an error message occur
"Unhandled exception".
I dont understand what is the issue ?? 
Is the problem occur because i am using resource of dll??
Thanks in advance.
Yes U Can ...If U Can ,Dream it , U can do it ...ICAN
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Thanks for your reply Sandip but i am using AFX_MANAGE_STATE.
Yes U Can ...If U Can ,Dream it , U can do it ...ICAN
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The debugger is your best friend.
Find the offending line and post the relevant code.
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.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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Thanks For your reply Pallini
After debugging the dll i knew that the crash occur when i domodal the dialog of dll.
Here is my code. ConfigurationCapture is exported function.
CConfigDlg is class having base class CDialog.
BOOL CCaptureScreen::ConfigureCapture(HWND hWndParent, CaptureData* lpData)
{
ASSERT(lpData);
if (!lpData)
return(FALSE);
lpData->bCaptureFullScreen = FALSE;
strcpy_s(lpData->szCaptureFilename,strlen(lpData->szCaptureFilename),"");
strcpy_s(lpData->szCapturePath,strlen(lpData->szCapturePath),"");
AFX_MANAGE_STATE(AfxGetStaticModuleState());
dlg = new CConfigDlg(lpData->bCaptureFullScreen, CA2T(lpData->szCapturePath));
BOOL bStat = FALSE;
if (dlg->DoModal() == IDOK) {--->Crash (UNHANDLED EXCEPTION)
bStat = TRUE;
lpData->bCaptureFullScreen = dlg->m_nFullScreen > 0;
strncpy_s(lpData->szCapturePath, MAX_PATH, CT2A(dlg->m_strPath), _TRUNCATE);
*lpData->szCaptureFilename = '\0';
}
return(bStat);
}
Yes U Can ...If U Can ,Dream it , U can do it ...ICAN
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Shilpi Boosar wrote: if (dlg->DoModal() == IDOK) {--->Crash (UNHANDLED EXCEPTION)
Unless dlg is NULL, that's not where the exception occurs.
It's in the MFC code somewhere....where?
Mark
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.freetls.fastly.net/script/Forums/Images/coffee.gif)
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Didnt get your point??? 
Yes U Can ...If U Can ,Dream it , U can do it ...ICAN
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I re-asked the question - where is the exception occurring?
It's not on the line you indicated unless your variable "dlg" is NULL.
You can step further in to find a more specific cause of the exception.
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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Yes the crash occur in when i domodal the dlg.
suppose i take this example
http://www.codeproject.com/KB/DLL/beginnerdll.aspx[^]
now i add one more class CDlg in it and add dialog box having id IDD_DLG.
dlg.h is like this
#pragma once
#include "afxwin.h"
#include "resource.h"
class CDlg :
public CDialog
{
public:
CDlg(void);
~CDlg(void);
enum { IDD = IDD_DLG };
};
and dlg.cpp is like this
#include "StdAfx.h"
#include "Dlg.h"
CDlg::CDlg(void)
{
}
CDlg::~CDlg(void)
{
}
IN myClass.h
i #include the dlg class and create object of m_dlg.
in function say hello i add line
m_dlg.DoModal();
Please check when i domodal the function than crash occur.
It anything wrong here.
Same problem is in my project also.
Yes U Can ...If U Can ,Dream it , U can do it ...ICAN
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It's hard to tell without the exact exception message and the exact code
where the error occurs.
Can you put a breakpoint on the DoModal() call and step into
the MFC code with the F11 key? You should be able to step to where
the actual exception occurs. The DoModal() call is too high in the
call stack for anything meaningful
Mark
Mark Salsbery
Microsoft MVP - Visual C++
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Ok you mean to say that in standard MFC files.
The function where the crash occur is AfxCallWndProcFile name is wincore.cpp
// delegate to object's WindowProc
lResult = pWnd->WindowProc(nMsg, wParam, lParam);
And the crash occur here
Please now tell me where i am wrong
Yes U Can ...If U Can ,Dream it , U can do it ...ICAN
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