C / C++ / MFC

release vs debug builds problem

16-Aug-02 8:43

Check these COM interfaces:

IDiskQuotaControl
IDiskQuotaEvents
IDiskQuotaUser
IDiskQuotaUserBatch
IEnumDiskQuotaUsers

AFAIK, there's no non-COM API with HQUOTAs and such.

Tomasz Sowinski -- http://www.shooltz.com

Never argue with an idiot, he'll bring you to his level and beat you with experience.

Bitmap question

Chun Te, Ewe16-Aug-02 8:11

Chun Te, Ewe

16-Aug-02 8:11

Dear all,

This problem of mine has been bugging me crazy.
I have to load a 24bit .bmp file and convert it to a 32 bit bmp file.

I've manage to load the bitmap file, display it on the screen and even made the code to make it a 32bit bitmap.

The problem is to attach the modified bits to the m_bmpBitmap CBitmap object. Then I get the info of the m_bmpBitmap with the BITMAP structure.
BITMAP bm;
m_bmpBitmap.GetBitmap(&bm);
The bm.bmBits is 0x0 which it shouldn't be.

All the CreateBitmap() and GetBitmap() funtions return successful but I can't even display the image to screen and I feel it is due to bm.bmBits = 0x0.
I've even tried to create a 24 bit bitmap with the same method below and it didn't work too.

I would like to be able to view the image that I created and as well as to be able to save it. I welcome any new ideas on how to approach this matter.

Many many thanks.
Chun Te, Ewe

-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

CBitmap m_bmpBitmapOri;
CBitmap m_bmpBitmap;
BYTE *m_pOriSrc, *m_pSrc;

HBITMAP hBitmap = (HBITMAP) ::LoadImage(AfxGetInstanceHandle(), "h:\\logo.bmp"
,IMAGE_BITMAP, 0, 0, R_LOADFROMFILE | LR_CREATEDIBSECTION);

m_bmpBitmapOri.Attach(hBitmap);

BITMAP bmOri;
m_bmpBitmapOri.GetBitmap(&bmOri); // Get the loaded bitmap
m_pOriSrc = (BYTE*)bmOri.bmBits; // Pointer to the original bitmap bits

// Prepare a new location
if(m_pSrc!=NULL) delete [] m_pSrc;
m_pSrc = new BYTE[(bmOri.bmHeight+1)*bmOri.bmWidth*4];

...
some code to change from 24bpps to 32 bpps (if needed I can provide)
...

if (m_bImageValid) m_bmpBitmap.DeleteObject();
// Creating the image
m_bmpBitmap.CreateBitmap( bmOri.bmWidth, bmOri.bmHeight, 1, 32, m_pSrc );

BITMAP bm; // Obtain info regarding bitmap
m_bmpBitmap.GetBitmap(&bm); //

// Create a device contect to load the bitmap into
CDC dcMem;
CClientDC pDC(this);
dcMem.CreateCompatibleDC(&pDC);

dcMem.SelectObject(m_bmpBitmap);
pDC.BitBlt(250, 7, bm.bmWidth, bm.bmHeight, &dcMem, 0, 0, SRCCOPY);
// Won't display image

Edit Box Scrolling

Ken Mazaika16-Aug-02 7:38

Ken Mazaika

16-Aug-02 7:38

I want to scroll to the last line of my edit box. Is there a simple way to do this? Thanks

-Ken Mazaika

Re: Edit Box Scrolling

Ken Mazaika16-Aug-02 8:43

Ken Mazaika

16-Aug-02 8:43

I tried this...is there a reason it didn't work?

//headerFile.h<br />
class CMsgBox : public CEdit<br />
{<br />
protected:<br />
	LESULT DefWindowProc(UINT message, WPARAM wParam, LPARAM lParam);<br />
};<br />
<br />
<br />

and in the module:

#include "headerFile.h"<br />
<br />
LRESULT CMsgBox::DefWindowProc(UINT message, WPARAM wParam, LPARAM lParam)<br />
{<br />
LRESULT result = CEdit::DefWindowProc(message, wParam, lParam);<br />
	if (message == WM_SETTEXT)<br />
		SendMessage(EM_SCROLL, SB_BOTTOM, 0);<br />
	return result;<br />
}<br />

Is there something I'm going wrong? Thanks.

-Ken Mazaika

ns16-Aug-02 5:49

16-Aug-02 5:49

My release build works but the debug build crashes at at the delete. It says its a memory check error. The release version sails on through. Actually the debug version will keep going after the crash(retry) then crash again, and retry restores it. So the logic is working but I'm doing something really wrong.

memory check error at 0x002F59AA = 0x00, should be 0xFD.

Any ideas?

Thanks,
ns

	char* photo1;
	
	photo1 = new char [strlen(pDoc->m_db.m_photoInfo)];

	
	strcpy(photo1,pDoc->m_db.m_photoInfo);

	char* pDelimiter = strstr (photo1, ",");

	ASSERT (pDelimiter != NULL);
	*pDelimiter = '\0';

	char* dbname = photo1;

	m_PhotoDBName = dbname;
 
	pDelimiter++;


	CString mineName = pDelimiter;


<code>	delete[] photo1</code>;

When I hit debug, it gave the error (user breakpoint called from code at (some address).

It went into dbgheap.c. Does this help in diagnosing the problem?

PJ Arends16-Aug-02 5:59

PJ Arends

16-Aug-02 5:59

You need to allocate room for the terminating NULL

photo1 = new char [strlen(pDoc->m_db.m_photoInfo) + 1];

CPUA 0x5041

Sonork 100.11743 Chicken Little

"So it can now be written in stone as a testament to humanities achievments "PJ did Pi at CP"." Colin Davies

Within you lies the power for good - Use it!

ns16-Aug-02 6:12

16-Aug-02 6:12

Well, that took care of one of them! The next crash is again at a delete[] (I just started using delete!) It turns out to be a variable I dont need, but still want to know whats wrong:

		m_pCommandPhoto->ActiveConnection = m_pConn1;


		CString partQuery = "'"+MineName+"'";

		char* partQuery0 = new char(partQuery.GetLength()+1);

		strcpy(partQuery0,partQuery);

		CString SQLQ = "SELECT * FROM tblMine WHERE (DefID = "+partQuery+")";

		char*  SQLQuery = new char [SQLQ.GetLength()+1];

		strcpy(SQLQuery, SQLQ);

		AfxMessageBox(SQLQuery);

		<code>delete[] partQuery0;</</code>pre>  //crashes here. This time I've got my +1 !!

Thanks,
ns

Roger Allen16-Aug-02 6:33

Roger Allen

16-Aug-02 6:33

You've used () in the new statement, which makes the length a parameter that is passed to the char constructor. This means that your newing with the non-[] form so delete [] fails

change it to

char* partQuery0 = new char[partQuery.GetLength()+1];

Roger Allen
Sonork 100.10016

I think I need a new quote, I am on the prowl, so look out for a soft cute furry looking animal, which is really a Hippo in disguise. Its probably me.

ns16-Aug-02 7:20

16-Aug-02 7:20

Thanks so much. So a new done my other way with () is legal? I didnt think we could do that. I appreciate your help,
Thanks,
ns

Incidentally the release version was perfectly happy with it!!! Would this have shown up later as a problem in the release?

Michael Dunn16-Aug-02 9:41

Michael Dunn

16-Aug-02 9:41

ns wrote:
So a new done my other way with () is legal?

Yes, although it means an entirely different thing. This allocates one char and initializes it:

char* pch = new char ('a');

Since chars and ints are interchangeable to a degree, you can stick a number less than 255 in place of 'a' above.

--Mike--
Just released - RightClick-Encrypt v1.3 - Adds fast & easy file encryption to Explorer
My really out-of-date homepage
Sonork-100.19012 Acid_Helm

ns16-Aug-02 10:09

16-Aug-02 10:09

Great! Thanks for the explanation. Appreciate it!

ns.
Wonder why the release exe didnt crash.

Tomasz Sowinski16-Aug-02 6:58

16-Aug-02 6:58

One bit of advice: why on Earth are you bugging yourself with new/delete when you're already using CString? Instead of new/strcpy just declare a CString and assign your text.

Tomasz Sowinski -- http://www.shooltz.com

Never argue with an idiot, he'll bring you to his level and beat you with experience.

WM_KILLFOCUS

Anonymous16-Aug-02 5:37

Anonymous

16-Aug-02 5:37

Hi!
I have a dialog based app. I have a bunch of child dialog in my main dialog which I keep showing and hiding based on a few user actions. I need to know when these child dialogs loose focus. I tried WM_KILLFOCUS, WM_ACTIVEATE, but for some reason neither of these messages get sent to my child dialog or even my main dialog for that matter. Does anybody have any suggestions on how I could fix this or maybe get around it?

Thanks,
NC

PJ Arends16-Aug-02 5:41

PJ Arends

16-Aug-02 5:41

How are you showing your child dialogs? Are you using DoModal() (modal dialogs) or Create() with ShowWindow() (modeless dialogs)?

NC16-Aug-02 7:22

16-Aug-02 7:22

Hi!

I am doing a create() and ShowWindow(). They are modeless dialogs.

Thanks

NC

PJ Arends16-Aug-02 14:58

PJ Arends

16-Aug-02 14:58

WM_ACTIVATE is the message you want to handle. It is sent to the window being activated, then to the window being deactivated.

Is there a way to see if a SOCKET is connected?

NC19-Aug-02 1:49

19-Aug-02 1:49

Hi!

I tried WM_ACTIVATE too. But for some reason, that doesn't get sent when activating the dialog or even when deactivating the dialog.

One more quick question regarding this - if the focus is on one of the controls on the dialog and if the focus is moved to another dialog altogether, will the original dialog which looses the focus still get the WM_ACTIVATE msg even though the focus was on one of the controls and not really on dialg. I am thinking that this is what is happening in my case since I am not getting the msg.

Thanks,

NC

Le centriste16-Aug-02 4:40

Le centriste

16-Aug-02 4:40

I mean, an easy way, like:

<br />
bool isConnected = IsConnected(mySocket);<br />

Or maybe with the select() function?

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: Is there a way to see if a SOCKET is connected?

Masaaki Onishi16-Aug-02 7:21

Masaaki Onishi

16-Aug-02 7:21

Hello, the codegurus around the world.;)

At CAsynSocket, OnConnect member function will return the error code
called "WSAEISCONN The socket is already connected".

So, you can call Connection function by some interval time, and
check if OnConnect will return this error code. Cool | :cool:

Please, don't send me your email about your questions directly.
Have a nice day!
Sonork - 100.10571:vcdeveloper Wink | ;)

-Masaaki Onishi-

how to idenitify whether process is running or not

tongc16-Aug-02 3:58

tongc

16-Aug-02 3:58

Hi
I started 2 processes in my app. and now every one second i want to see if these processes are still running. Coud anyone please tell me how i can get the status of a process to see whether it is running or has been terminated?

thanks

Re: how to idenitify whether process is running or not

Tomasz Sowinski16-Aug-02 4:04

Re: how to idenitify whether process is running or not

16-Aug-02 4:04

tcuong wrote:
now every one second i want to see if these processes are still running

Why 'every one second'? Can't you create a thread which waits for process termination with WaitForSingleObject, then posts a message?

Tomasz Sowinski -- http://www.shooltz.com

Never argue with an idiot, he'll bring you to his level and beat you with experience.

tongc16-Aug-02 6:04

tongc

16-Aug-02 6:04

this is to monitor if the processes are running or not? It is just an excercise to get myselft familiar with Win32 programming.

First i create 5 process namely notepad.exe . Then i have to monitor that how many of these processes are running every 1 second. I've attempted many ways to do it but i failed. This is how i did it.

<br />
void main()<br />
{<br />
//	HANDLE handle;<br />
	STARTUPINFO startUpInfo[5];<br />
	PROCESS_INFORMATION proInfo[5];<br />
	BOOL success;<br />
	HANDLE proHandle[5];<br />
	INT i;<br />
	INT runningProcess = 5;<br />
	CHAR appName[100];<br />
	<br />
	<br />
<br />
	<br />
	strcpy(appName, "c:\\windows\\notepad.exe");<br />
<br />
<br />
	//DWORD status[5];<br />
	<br />
	<br />
	for(i = 0; i <5; i++)<br />
		GetStartupInfo(&startUpInfo[i]);<br />
	<br />
<br />
	//Create process<br />
	for(i = 0; i < 5; i++)<br />
	{<br />
		success = CreateProcess(appName, 0, 0, 0, FALSE, 0, 0,0,&startUpInfo[i], &proInfo[i]);<br />
		<br />
		if(!success)<br />
			cout <<" Error creating process: "<< GetLastError() <<endl;<br />
		<br />
		cout << "The process ID is " << proInfo[i].dwProcessId << endl;<br />
	}<br />
<br />
	for(i = 0; i <5; i++)<br />
	{<br />
		proHandle[i] = proInfo[i].hProcess;<br />
	}<br />
<br />
while (WaitForMultipleObjects(5, proHandle, TRUE, 1000) == WAIT_TIMEOUT)<br />
	{<br />
		for(i = 0; i < 5; i++)<br />
		{<br />
			if(proInfo[i].hProcess == NULL)<br />
				runningProcess--;<br />
<br />
		}<br />
		<br />
	<br />
		printf(" %d ", runningProcess);		 <br />

I know that this code may look silly to some of you but instead of laughing, please guide me to the right direction. Thanks

Re: how to idenitify whether process is running or not

Tomasz Sowinski16-Aug-02 7:04