C / C++ / MFC Discussion Boards

Jawache18-Sep-02 6:20

18-Sep-02 6:20

Yeah thats what i use.

Do you also use the CVSIn Plugin for VC6, i think my problems stemming from there?

Asim Hussain
e: asim@jawache.net
w: www.jawache.net

Re: CVS and VC++

Pavel Klocek18-Sep-02 6:25

Pavel Klocek

18-Sep-02 6:25

Jawache wrote:
Do you also use the CVSIn Plugin for VC6?
No.

I'm checking the files with the option "Checkout read-only" unchecked and I'm not using the Edit function, maybe this can be the difference Confused | :confused:

.

Pavel
Sonork 100.15206

These user breakpoints are driving me crazy! Please help.

Redeemer-dk18-Sep-02 5:35

Redeemer-dk

18-Sep-02 5:35

Now my programs is acting really weird. What worked before now displays a "User breakpoint" error when i move my mouse over the "open file" dialog. Here's my browse dialog which worked fine before:

void OnBrowse()
{
	OPENFILENAME ofn;
	char szFileName[MAX_PATH+1];
	const char szFilter[] = "All Files (*.*)\0" "*.*\0";

	szFileName[0] = '\0';
	ofn.lStructSize = sizeof(OPENFILENAME);
	
	ofn.hwndOwner = ghMainWnd;
	ofn.lpstrFilter = szFilter;
	ofn.lpstrCustomFilter = (LPSTR)NULL;
	ofn.nFilterIndex = 1;
	ofn.lpstrFile = szFileName;
	ofn.nMaxFile = sizeof(szFileName);
	ofn.lpstrFileTitle = NULL;
	ofn.lpstrInitialDir = NULL;
	ofn.lpstrTitle = (LPSTR)NULL;
	ofn.Flags = OFN_ENABLESIZING | OFN_FILEMUSTEXIST | OFN_HIDEREADONLY | OFN_PATHMUSTEXIST | OFN_EXPLORER;
	ofn.nFileOffset = 0;
	ofn.nFileExtension = 0;
	ofn.lpstrDefExt = "";

	if (GetOpenFileName(&ofn))
		SetDlgItemText(ghMainWnd, IDC_SOURCEFILE, szFileName);
}

It worked fine before, but now when i have added a new function which should execute after the OnBrowse function is done, i get a "User breakpoint" message when i move my mouse over the dialog:
Unhandled exception at 0x77f767cd in MP3.exe: User breakpoint.

Here's the contents of the Call Stack when the erros appears:

ntdll.dll!77f767cd()    <- stops here
ntdll.dll!77fa2f17()
ntdll.dll!77f842f4()
ntdll.dll!77f635c7()
msms001.vwp!017b7b68()
msms001.vwp!017b7539()
msms001.vwp!017afcf7()
vct3216.dll!00c34326()

And this appears in the Output pane:

HEAP[MP3.exe]: Invalid Address specified to RtlFreeHeap( 01810000, 01814270 )
Unhandled exception at 0x77f767cd in MP3.exe: User breakpoint.

All help is appreciated.

-Rune Svendsen

Re: These user breakpoints are driving me crazy! Please help.

Bart Robeyns18-Sep-02 6:11

Bart Robeyns

18-Sep-02 6:11

You actually should be thankful for the user-breakpoint: it is called by the debug-version of your program, because an assert failed. RtlFreeHeap even tells you why it failed: you're trying to free a memory-block that either has been damaged or was never allocated. RtlFreeHeap knows this because it puts a signature before and after each allocated block and the signatures before the block you're trying to free don't match.
Figure out which variable is being mishandled, and your program will stop acting weird.
When you say it 'worked before', you're probably saying it worked in release-build: no assertions are being performed, and the RT will be happy to free anything you ask it to, even things that were never allocated.

Re: These user breakpoints are driving me crazy! Please help.

Redeemer-dk18-Sep-02 6:35

Redeemer-dk

18-Sep-02 6:35

Thanks for your help. But how is it possible to find out what variable is being mishandled when the error happens when i move my mouse over the dialog created by the GetOpenFileName API?

Thanks

Comparing a character string to LPWSTR

abhinarulkar18-Sep-02 5:13

abhinarulkar

18-Sep-02 5:13

Hi all,
I need to compare 2 strings,one is a simple character string and the other is a LPWSTR value.How can I do it.Is there any type conversion available.
Thanks
Abhishek.

Learning is a never ending process of Life.

Re: Comparing a character string to LPWSTR

Paul M Watt18-Sep-02 5:18

Paul M Watt

18-Sep-02 5:18

You will need to convert one of the strings into the same format as the other. Which one you choose does not matter.

Use one of these functions:

MultiByteToWideChar
WideCharToMultiByte

Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!

Re: Comparing a character string to LPWSTR

Bart Robeyns18-Sep-02 6:14

Bart Robeyns

18-Sep-02 6:14

Isn't it best to convert the single-byte to wide-format? If conversion from wide- to single-byte format looses information (because some widechars are not representable), the strings might match after conversion, even if they don't actually match... No?

Re: Comparing a character string to LPWSTR

Le centriste18-Sep-02 6:21

Le centriste

18-Sep-02 6:21

example:

USES_CONVERSION;
LPCSTR s1 = "Hello World!";
LPCWSTR s2 = L"Hello World!";

int i = _tcscmp(A2CT(s1), W2CT(s2));

There is other ways, but more complicated.

Michel

It is a lovely language, but it takes a very long time to say anything in it, because we do not say anything in it, unless it is worth taking a very long time to say, and to listen to.

- TreeBeard

In VB 6.0 How do I check to see if an Executable is running?

BHBAD200218-Sep-02 5:03

BHBAD2002

18-Sep-02 5:03

Good day all Smile | :)

I was wondering if someone could help with this. I need to find a way of checking to see that if my application that I built is currently running? Any information would be a great help.

Thanks.

Re: In VB 6.0 How do I check to see if an Executable is running?

Paul M Watt18-Sep-02 5:22

Paul M Watt

18-Sep-02 5:22

Just use the prevInstance member value of the App object.

If (App.prevInstance) Then
   MsgBox "This is the second instance of your app"
End If

When you run your program, the first time, nothing will happen, the second time you will get a message box indicating that there is a previous instance of your app running.

Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!

how could I find my articles wrote in this fourm ?

Angel Kid18-Sep-02 4:35

Angel Kid

18-Sep-02 4:35

I wanna find my articles which I wrote in this fourm some days ago ,how could I do that?thx

YES, I am here.

Re: how could I find my articles wrote in this fourm ?

benjymous18-Sep-02 4:50

benjymous

18-Sep-02 4:50

You mean old forum posts?

Look at the top of the page on the left, under the Options it should display your username. Click on that to get to your profile page.

From there, click the "Messages Posted" link, and it'll show all the posts you've made

--
Help me! I'm turning into a grapefruit!

Re: how could I find my articles wrote in this fourm ?

jmkhael18-Sep-02 4:50

jmkhael

18-Sep-02 4:50

u can try to search for it, using the search in the top of the thread page on the right if u know ur name is enough!

Papa
Murex Co.

while (TRUE)
Papa.WillLove ( Bebe ) ;

I mean that I wanna find all articles I wrote in this fourm

Angel Kid19-Sep-02 3:46

Angel Kid

19-Sep-02 3:46

It seems that I could not find with set my name as the keyword in this fourm.

YES, I am here.

where to delete or destroy object?

ns18-Sep-02 4:16

18-Sep-02 4:16

My custom database class has this destructor:

	~DbClass()
	{
		Close();
		m_pConn.Release();
		m_pConn = NULL;
		m_strConnection = _T("");



<code>		if(m_pConnPhoto )
		{
			if(m_pConnPhoto->GetState() != ADO::adStateClosed)

			m_pConnPhoto->Close();

		}

		m_pConnPhoto.Release();
		m_pConnPhoto = NULL;
		m_strConnection1 = _T("");</code>
	
		::CoUninitialize();
	}

I added the stuff in red to a preexisting sample, so I'm not sure if it looks okay.

Anyways I made a MyDBClass m_db variable in the doc of my mfc mdi app. So far I havent deleted (??)it anywhere. Not even sure if I need to destroy or delete it, or take care of it somehow...

What do you think?

Thanks,
ns Confused | :confused:

Re: where to delete or destroy object?

Bilal18-Sep-02 4:43

Bilal

18-Sep-02 4:43

for every new there's a delete somewhere...else there's no need I feel. If you need a delete put it in the CMyAppDoc::OnCloseDocument() override.

Which lib is corresponding to Dskquota.h?

Anonymous18-Sep-02 4:12

Anonymous

18-Sep-02 4:12

Hi all,
I want to use IDiskQuotaControl interface to set per user quota on a network shared volume. But I need include the lib into my project which implement the interface.
Which lib is that?

Thanks for your answer.
Laura

Re: Which lib is corresponding to Dskquota.h?

Lakitu18-Sep-02 4:19

Lakitu

18-Sep-02 4:19

You don't need a specific lib, CoCreateInstance with CLSID CLSID_DiskQuotaControl should work.

Look! They have the Internet on computers now! (Homer J. Simpson)

Re: Which lib is corresponding to Dskquota.h?

Anonymous18-Sep-02 4:46

Anonymous

18-Sep-02 4:46

I tried, but always got link error 2001:
Execution.obj : error LNK2001: unresolved external symbol _CLSID_DiskQuotaControl
Execution.obj : error LNK2001: unresolved external symbol _IID_IDiskQuotaControl

Re: Which lib is corresponding to Dskquota.h?

Le centriste18-Sep-02 6:22

Le centriste

18-Sep-02 6:22

try __uuidof(DiskQuotaControl) and __uuidof(IDiskQuotaControl) instead.

Michel

It is a lovely language, but it takes a very long time to say anything in it, because we do not say anything in it, unless it is worth taking a very long time to say, and to listen to.

- TreeBeard

Re: Which lib is corresponding to Dskquota.h?

Anonymous18-Sep-02 8:04

Anonymous

18-Sep-02 8:04

Yes I find a sample code for this.
just add #define INITGUIDS
(like _uuid())
Thanks you all.

Making Right align Rich Edit box !

Hadi Rezaee18-Sep-02 4:07

Hadi Rezaee

18-Sep-02 4:07

Hello there,
How can i make a Right aligned RichEdit box, programically ??

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Problem with SQL FETCH

Cheickna18-Sep-02 4:04

Cheickna

18-Sep-02 4:04

Hi,

I have some problem with this query i execute under visual C++6.0

"SELECT Nom, CodePostal, Sum(Montant) AS MontantRemb, DateTraitement <br />
FROM TClient GROUP BY Nom, CodePostal, Montant,DateTraitement <br />
HAVING (((DateTraitement)=#09/05/2002#));"

In Microsoft Access interface it work well but if i execute it via ODBC like this :

retcode = SQLExecDirect(m_hstmt,(SQLCHAR*)strSQL, SQL_NTS);

this isntruction work also but i have a problem with SQL Fetch:

while (( retcode = SQLFetch(m_hstmt))!= SQL_NO_DATA)<br />
   {	<br />
	SQLGetData(m_hstmt, 1, SQL_C_CHAR, szNomClient, 25, &cbName);<br />
	SQLGetData(m_hstmt, 2, SQL_C_CHAR, szCodePostal, 6, &cbName);<br />
	SQLGetData(m_hstmt, 3, SQL_C_CHAR, szMontant,   16, &cbName);<br />
	SQLGetData(m_hstmt, 4, SQL_C_CHAR, szDateTraitement,   11, &cbName);<br />
   }

Here retcode return 100 and i can't obtain my data

Thanks in advance for any help

Re: Problem with SQL FETCH

TyMatthews18-Sep-02 5:10

TyMatthews

18-Sep-02 5:10

Are you sure your datatypes in the calls to SQLGetData() are correct? Your select statement has column #3 as Sum(Montant). Without knowing your table structure, I'm guessing Montant is a numeric field, in which case you'll want to use something like SQL_C_ULONG with a size of 4 bytes. Your date field, the 4th column, would also have a problem. That should go with SQL_C_TYPE_TIMESTAMP, assuming it's stored as a date field in your table and not a string. SQL_C_CHAR is only used for character (string) columns.

"The significant problems we face cannot be solved at the same level of thinking we were at when we created them." -Albert Einstein

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