Re: memory problem with bitmaps - C / C++ / MFC Discussion Boards

Phil J Pearson1-Sep-04 2:54

1-Sep-04 2:54

Reposted here from Operating Systems / SysAdmin. I apologise if this is impolite but it seems more likely to get answered here.

I need a simple, programmatic way to set up a small number of accounts on new PCs running Windows XP.

I'm prepared to write script (VBScript or Javascript), .NET code (C#) or even an app in C++

Please can someone give me a clue as to where would be the best place to start. Just pointing me to something relevant on MSDN would be fine.

Thanks in advance,

Phil

The opinions expressed in this communication do not necessarily represent those of the author (especially if you find them impolite, discourteous or inflammatory).

Re: Creating user accounts in XP

Antony M Kancidrowski1-Sep-04 3:15

Antony M Kancidrowski

1-Sep-04 3:15

OK, try MSDN here NetUserAdd[^]

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

Re: Creating user accounts in XP

Phil J Pearson1-Sep-04 3:43

Phil J Pearson

1-Sep-04 3:43

Excellent! Thanks, I'm off and running.

The opinions expressed in this communication do not necessarily represent those of the author (especially if you find them impolite, discourteous or inflammatory).

Re: Creating user accounts in XP

Phil J Pearson1-Sep-04 5:05

Phil J Pearson

1-Sep-04 5:05

OK, so I can add a user but NetGroupAddUser fails with NERR_GroupNotFound.

NetQueryDisplayInformation will only display one group called "None"/"Ordinary users".

The program is running as a local administrator and I've even tried impersonating Administrator.

Any ideas?

The opinions expressed in this communication do not necessarily represent those of the author (especially if you find them impolite, discourteous or inflammatory).

Re: Creating user accounts in XP

darkbyte1-Sep-04 8:31

darkbyte

1-Sep-04 8:31

Is the XP system connected to a Domain with Active Directory ?

How about NetLocalGroupAddMembers() ?

Assert message

Anonymous1-Sep-04 2:54

Anonymous

1-Sep-04 2:54

Hello,
I'm writing a C# application using managed and unmanged c++ libraries.
I have a bug, which causes an assertion "_BLOCK_TYPE_IS_VALID".
The message appears always in a different places.
Exceptions handling is not helping. Where to look?

memory problem with bitmaps

eNez1-Sep-04 1:50

eNez

1-Sep-04 1:50

Hi there!

I'm trying to show a series of bitmaps in a DialogBox but when I do this i have a big memory leak and I don't find how to stop it...
I've found that every time i call SetBitmapBits a new bitmap is allocated somewhere.

Oh, I'm also trying to deal with the flickering of the image Big Grin | :-D

code:
void CLeakTestDlg::OnBnClickedLoop()
{
CClientDC dcScreen(this);
BYTE *bmp = new BYTE[250*250*4];
int i;
CBitmap image;

image.CreateCompatibleBitmap(&dcScreen,250,250);

for (i=0;i++<100;)
{
memset(bmp,(int)(2.5*i),250*250*4);
image.SetBitmapBits(250*250*4,bmp);
cImage.SetBitmap(image); //cImage is a CStatic control of a Picture Control
}

delete[] bmp;
}

Re: memory problem with bitmaps

David Crow1-Sep-04 4:26

David Crow

1-Sep-04 4:26

eNez wrote:
...i have a big memory leak and I don't find how to stop it...

How do you know there is a memory leak?

I do not see that the for loop is doing anything productive. The first time through, it sets bmp to value 0, then to 2, then to 4, etc. Since little to no time has elapsed between calls to SetBitmap(), the net result is that only the last call to SetBitmap() will be seen, and even then I'm not sure what it will be.

Have you checked the return value of CreateCompatibleBitmap() and SetBitmapBits()?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: memory problem with bitmaps

eNez1-Sep-04 4:37

eNez

1-Sep-04 4:37

After an run the function Task Manager show me 25 more Mb used by the program Smile | :)

i'm using vs.net 2002,
apparently the same code compiled under vc++6 have any problem.
(also vs.net 2003 have the same leak)

this loop do anything Smile | :)

the true program have to load images from a raw file and show them in sequence in the dialog.
because the image are encoded in a non-standard way i have to put the pixel values one by one in the bmp matrix.

I've written this function after seeing the leak in the main program(1000 frames = ~ 130Mb lost).

this are the same commands used to display the pictures and the memory is flooded the same way...

this is the code of the project
http://ombre.gamersrevolt.it/leaktest.zip

Re: memory problem with bitmaps

David Crow1-Sep-04 4:43

David Crow

1-Sep-04 4:43

eNez wrote:
After an run the function Task Manager show me 25 more Mb used by the program

Do not use Task Manager to determine your program's memory consumption. It's a common misconception that the numbers reported by Task Manager are an accurate representation of your program's memory consumption, when they are actually just the size of your program's address space. Read this article, especially the last section, for a more detailed explanation.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: memory problem with bitmaps

eNez1-Sep-04 4:56

eNez

1-Sep-04 4:56

i see...
but this thing has anyway something wrong...

if i keep pushing the button that lauches the loop the memory used keep growing.

and... using GDIndicator (http://msdn.microsoft.com/msdnmag/issues/03/01/GDILeaks/default.aspx)
i see 100 more bitmaps every time i run the function...

and last thing the SAME code compiled with vc++6 don't eat memory, and don't uses more bitmaps Smile | :)

(and it run also considerably fast)
at least all this is strange Smile | :)

How to close open ComboBox ?

Anonymous1-Sep-04 1:49

Anonymous

1-Sep-04 1:49

Need to close from handler of opening.

ShowDropDown(false)
not helps, due to it is probable handler ?

How to resolve this?

Thanks

Re: How to close open ComboBox ?

Ivan Cachicatari2-Sep-04 19:22

Ivan Cachicatari

2-Sep-04 19:22

Use the CB_SHOWDROPDOWN message

// To show
SendMessage(m_combobox.m_hWnd, CB_SHOWDROPDOWN, 1)

// To hide
SendMessage(m_combobox.m_hWnd, CB_SHOWDROPDOWN, 0)

Ivan Cachicatari
www.latindevelopers.com

Bit Inversion

sweep1231-Sep-04 1:48

sweep123

1-Sep-04 1:48

Very simple question how do you invert (or NOT) the bits in say a char.

e.g. char x = 0xCF;  // 1100 1111<br />
<br />
Invert(x);           // 0011 0000

From what I can see ther are only AND, OR and XOR that work on bitfields.

I am sure I am missing something!

Not too rude please.

Re: Bit Inversion

RChin1-Sep-04 2:08

RChin

1-Sep-04 2:08

use the ~ bitwise operator.

<br />
char x = 0xCF;<br />
char NOTx = ~(x);<br />

I Dream of Absolute Zero

Re: Bit Inversion

sweep1231-Sep-04 2:55

sweep123

1-Sep-04 2:55

Thanks, could not find it in my reference book or help.

Re: Bit Inversion

PJ Arends1-Sep-04 5:39

PJ Arends

1-Sep-04 5:39

http://www.codeproject.com/cpp/bitbashing.asp[^]

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

Re: Bit Inversion

Archer2821-Sep-04 12:37

Archer282

1-Sep-04 12:37

if you want to reverse them you can use the Binary XOR (^) by 0xFF //(255)

example:
0xCF ^ 0xFF = 0x30
0x30 ^ 0xFF = 0xCF

Help required

Sreekanth Muralidharan1-Sep-04 0:30

Sreekanth Muralidharan

1-Sep-04 0:30

Hello
I am developing an application with DLL support. I selected an MFC shared DLL accordingly and everything goes on fine, when I run the application from the Execute tool bar in the Visual Studio. But when I run the application independantly, by double clicking the executable in the Debug folder, I cannot load the DLL. Help me with a solution to this.
Regards,
Sreekanth Muralidharan,
Hyderabad

Re: Help required

Antony M Kancidrowski1-Sep-04 3:30

Antony M Kancidrowski

1-Sep-04 3:30

Check the working directory within VS. The DLLs must be in there.

Generally when an application looks for its DLLs it start by looking in:

* The working directory.
* The windows directory.
* The windows system directory.

You can either create a shortcut so that the working directory is the same. Build the application into the appropriate working directory or move/copy the DLLs the applictaion needs into its working (DEBUG) directory.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Williams (Little Britain)

VS.NET Resource Editor

Jörgen Sigvardsson31-Aug-04 23:48

Jörgen Sigvardsson

31-Aug-04 23:48

When I import 32 bit icons into the resources, VS.NET removes the alpha layer from the 32x32 icon, thus making it into a 24 bit icon. Is there any way to make VS.NET stop doing that?

The only workaround I know so far is to add the icon resources manually by editing the .rc as a text file.

--
...Coca Cola, sometimes war...

how to change the default PC soundcard settings when i have two soundcards in PC

max_xiayi31-Aug-04 23:20

max_xiayi

31-Aug-04 23:20

I know how to change it by manually changing the control pad settings.
But what i want to know is how to change the settings in my programm.How?

please contact:
max_xiayi@hotmail.com

Re: how to change the default PC soundcard settings when i have two soundcards in PC

Hossein Khosravi31-Aug-04 23:32

Hossein Khosravi

31-Aug-04 23:32

Hi, I have done it, you must use DirectSound API and enumerate your sound card devices, then you can use their GUIDs to select each one separately.
I will take my program in codeproject as soon as possible.

Re: how to change the default PC soundcard settings when i have two soundcards in PC

max_xiayi1-Sep-04 1:33

max_xiayi

1-Sep-04 1:33

Hi,can u send the program to me directly at xiayi@ustc.edu or max_xiayi@hotmail.com?
It is urgent for me.Thanks a lot.

please contact:
max_xiayi@hotmail.com

how to change the default PC soundcard settings when i have two soundcards in PC

max_xiayi31-Aug-04 23:16

max_xiayi

31-Aug-04 23:16

I know how to change it by manually changing the control pad settings.
But what i want to know is change the settings in my programm.How?

please contact:
max_xiayi@hotmail.com

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