C / C++ / MFC Discussion Boards

Re: How to debug a program for unknown error??

Randor 15-Jan-09 12:57

Randor

15-Jan-09 12:57

Kiran Satish wrote:
Are there any settings that needs to be set in project options of the applicaiton in debug mode??

Yes.
You need to go into the linker->Debugging settings and make sure:

"Generate Debug Info" == Yes

Some documentation:

PDB Files (C++)[^]

/Z7, /Zi, /ZI (Debug Information Format)[^]

Project Settings for a C++ Debug Configuration[^]

Best Wishes,
-David Delaune

Re: How to debug a program for unknown error?? [modified]

Kiran Satish15-Jan-09 13:46

Kiran Satish

15-Jan-09 13:46

That option "Generate Debug Info" is always enabled in my applications in debug mode. Will go through the PDB files article in a min.
I found a problem/unhandled exception wihtin the application relating to CComVariant. As I said my application communicates with another system using ethernet while at the same time it communicates with another program within the system using COM port. Inorder to handle the events from COM port (CMSComm object), I use a CComVariant object to read the data from CMSComm object whenever it triggers OnReceiveMessage() event. This is how I have used it in my program -

void CMyApplicationDlg::OnReceiveMessage() //1
{//2
 if(m_ComRecCommand.GetCommEvent() == 2) //3 On receiving data at the receive buffer
 {//4
  CString buffer,vidname,val;//5
  m_cvRespInput.Clear();//6
  m_cvRespInput = m_ComRecCommand.GetInput();	//7
  buffer = m_cvRespInput.bstrVal;//8
 }//9
}//10

It gives me error at line 8, when I watch the variable in debug mode, it shows VT_ERROR for CComVariant object. This is not the case before using ethernet communication from another system. But once I use it, this one shows only VT_ERROR. Am confused on understanding why this is happening??? Confused | :confused:

PKNT

modified on Thursday, January 15, 2009 8:56 PM

Re: How to debug a program for unknown error??

Randor 15-Jan-09 16:20

Randor

15-Jan-09 16:20

Kiran Satish wrote:
when I watch the variable in debug mode, it shows VT_ERROR for CComVariant object.

What is the m_cvRespInput.scode (status code) value? It should be giving you an error code.

Best Wishes,
-David Delaune

Programming Cell Phone with MIDP on C-language

Michael Monin14-Jan-09 10:20

Michael Monin

14-Jan-09 10:20

If you are C-programmer and need to write simple application for Cell Phone with MIDP you need not learn Java-language if you use method described in Codeproject article:
http://www.codeproject.com/KB/cross-platform/Java-Rapid.aspx

CP IGNORE - Not a question.

leckey14-Jan-09 11:02

leckey

14-Jan-09 11:02

...

"Well, we're getting "F"'d at work. WPF, WCF, and WWF... WTF?" --John Simmons

This is a question

Luc Pattyn14-Jan-09 12:52

Luc Pattyn

14-Jan-09 12:52

Would all 5.8 million of you members, plus those few programmers who aren't members yet, please be so kind as to read my excellent article, vote it 5, bookmark it and download the code provided?

TIA

Luc Pattyn [Forum Guidelines] [My Articles]

I use ListBoxes for line-oriented text (not TextBoxes), and PictureBoxes for pictures (not drawings).

Re: This is a question

Hamid_RT14-Jan-09 18:44

Hamid_RT

14-Jan-09 18:44

But 5 of left or right ?
Big Grin | :-D

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Re: This is a question

CPallini14-Jan-09 21:33

CPallini

14-Jan-09 21:33

I wonder why don't you ask also for money... Roll eyes | :rolleyes:

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]

My vote of 1

CPallini14-Jan-09 21:28

CPallini

14-Jan-09 21:28

[^].

Re: My vote of 1

Luc Pattyn15-Jan-09 1:15

Luc Pattyn

15-Jan-09 1:15

CPallini wrote:

Advertising the article in the C++ forum is really shameful.

And what about advertising one's own message? Laugh | :laugh:

Luc Pattyn [Forum Guidelines] [My Articles]

I use ListBoxes for line-oriented text (not TextBoxes), and PictureBoxes for pictures (not drawings).

View activation

Member 465568514-Jan-09 4:25

Member 4655685

14-Jan-09 4:25

i have a view i need a function getting called when that view is activated or updated

Re: View activation

Iain Clarke, Warrior Programmer14-Jan-09 4:28

Iain Clarke, Warrior Programmer

14-Jan-09 4:28

CView::OnActivateView looks good for you.

Iain.

Codeproject MVP for C++, I can't believe it's for my lounge posts...

Re: View activation

Member 465568514-Jan-09 23:24

Member 4655685

14-Jan-09 23:24

could you plz any MDIChildWnd function

Re: View activation

Iain Clarke, Warrior Programmer14-Jan-09 23:35

Iain Clarke, Warrior Programmer

14-Jan-09 23:35

Are you using MFC?

If you are using raw windows code, then maybe you could look at WM_SETFOCUS?

Other than that, I don't understand your question.

Iain.

Codeproject MVP for C++, I can't believe it's for my lounge posts...

Re: View activation

Member 465568514-Jan-09 23:48

Member 4655685

14-Jan-09 23:48

ya i am using MFC
i have a scenario i am importing other personalities into the scenario at that time that view is updated
i found one function msdn that is OnMDIActivate it is getting called all the times but it is not getting called when importing personalities
here we are using MDiChildWnd class for that

Re: View activation

Iain Clarke, Warrior Programmer15-Jan-09 0:01

Iain Clarke, Warrior Programmer

15-Jan-09 0:01

Scenario and Personalities are not MFC terms that I know.

Is this data you are loading into your document?

If you are importing things, I guess you have written code there to do the importing? So you already know when this is happening...
If this is in your CDocument class, you can use UpdateAllViews to tell your view class that something interesting has happened.

Iain.

Codeproject MVP for C++, I can't believe it's for my lounge posts...

Re: View activation

Stephen Hewitt14-Jan-09 4:29

Stephen Hewitt

14-Jan-09 4:29

I assume you're using MFC? If so perhaps overriding CView::OnActivateView[^] will do the trick.

Steve

How to convert IPv6 IP Address to Ipv4 address

singh_nav14-Jan-09 2:27

singh_nav

14-Jan-09 2:27

Hi all,

If i check the IP address of any machine then it shows the following notation of IP in case of IPv4
"127.0.0.1"

And in case of Ipv6
"fe80::198:8ad2:22fe:2bff8%4"

Is there any API or C function or any logic to convert IPv6 address to IPv4 Address for window and linux.

Thanks

Re: How to convert IPv6 IP Address to Ipv4 address

David Crow14-Jan-09 2:48

David Crow

14-Jan-09 2:48

singh_nav wrote:

Is there any API or C function or any logic to convert IPv6 address to IPv4 Address for window and linux.

Only to a limited degree. See here for more. The operative sentence is, "Obviously, that's impossible, since IPv6 has a larger address space... Your technique will only work on IPv4-mapped IPv6 addresses".

"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

Credentails Issue

sandygg14-Jan-09 0:31

sandygg

14-Jan-09 0:31

Hi All,

I have an application which collect data remotly but when connection is made to the machine then it fails either because of Credential error (given username/password is wrong) or Access denied error (user doesn't have enough rights). I want differentiate between these two scenarios. How i can verify whether entered username and password are right. The account gets locked (password is wrong) when attempts match a/c locked out count.

I have used LogonUser and ImpersonateLoggedOnUser API's.(Any WINSDK API to verify Credentials.)

Thanks
Sandy

Re: Credentails Issue

Graham Bradshaw14-Jan-09 7:16

Graham Bradshaw

14-Jan-09 7:16

Surely LogonUser will fail if the credentials are invalid (bad username or password), but if the user can be logged on, but doesn't have rights to access the object you want to access, it will fail when you try to access the object.

Don't forget that you can only use LogonUser to log on to the local machine.

Re: Credentails Issue

sandygg24-Feb-10 3:41

sandygg

24-Feb-10 3:41

GetLastError Solved the problem...

SSPI session

maoxintt13-Jan-09 23:08

maoxintt

13-Jan-09 23:08

I want to create SSL connection to WEB server in client using SSPI .There is a session which is bind with the connection. I want to know the My client can share this session( this connection)?
My client is built by ChtmlView.

That is ,after I create a SSL connection to web server, Chtmlview can put the HTTP request to SSL connection , and get the HTTP response from the SSL connection(session). chtmlview communicate with web server in this connection made by SSPI.

Lampa

atoi() not working properly in case of Unicode character set.

Le@rner13-Jan-09 17:55

Le@rner

13-Jan-09 17:55

Hi all,

if i m using atoi function in Multi Byte than its working fine.

but if i m use it in Unicode than its not working correctly.

here,

CString str=_T("2006");
char * szMyString = (char *) (LPCTSTR) str;
int test=atoi(szMyString);

here the value in integar is 2

please tell me where i m wrong.

thanks in advance.

IN A DAY, WHEN YOU DON'T COME ACROSS ANY PROBLEMS - YOU CAN BE SURE THAT YOU ARE TRAVELLING IN A WRONG PATH

Re: atoi() not working properly in case of Unicode character set.

bob1697213-Jan-09 18:04

bob16972

13-Jan-09 18:04

You might want to read the documentation in MSDN for atoi. It has a table toward the middle that indicates you would use _wtoi when _UNICODE is defined.

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