C / C++ / MFC

PatrykDabrowski8-Jan-07 1:31

PatrykDabrowski

8-Jan-07 1:31

I have similar thing with my multithreaded application. When I create for example 100 dialog windows (each on separate thread) and then I close all of them exept main dialog, memory usage falls down but is not equal to the usage before opening those 100 windows. Visual studio does not report any memory-leaks. I suppose that system is allocating memory for the application but is not freeing everything just in case the application would request again some memory. Maybe it's also your case??

Pat.

Cedric Moonen8-Jan-07 1:32

Cedric Moonen

8-Jan-07 1:32

Did you allocate a lot of memory that you didn't release ? How is the memory increasing ? Little by little ? If yes, that probably means that you have a memory leak somewhere in your code.

Cédric Moonen
Software developer

Charting control [v1.1]

David Crow8-Jan-07 4:01

David Crow

8-Jan-07 4:01

Sakthiu wrote:
still memory that is used by thread is in alive ? I want to reduce that memory usage. How ?

See here.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

How to play .wav file and control speed of the playing .wav file

Roger Stoltz8-Jan-07 4:57

Roger Stoltz

8-Jan-07 4:57

It's quite normal for the application to require more memory since another thread context must be created. Unless you explicitly allocate what you refer to as "high"; don't bother, you're wasting your time.
See here[^] for more info, especially the part about Task Manager.

--
Roger

"It's supposed to be hard, otherwise anybody could do it!" - selfquote

"No one remembers a coward!" - Jan Elfström 1998
"...but everyone remembers an idiot!" - my lawyer 2005 when heard of Jan's saying above

CraZyToLearn8-Jan-07 1:10

CraZyToLearn

8-Jan-07 1:10

I want to play .wav file using waveform audio functions i.e WAVEFORMATEX and using the functions waveOutOpen, waveOutWrite etc..

I have tried it, but I could play only part of the file. And even I want to control the speed of that played file i.e. to increase the speed or decrease the speed of the .wav file. Please Help me out.

Thanks in Advance

CraZyToLearn

CraZyToLearn Smile | :)

Re: How to play .wav file and control speed of the playing .wav file

Rajesh R Subramanian8-Jan-07 3:51

Re: How to play .wav file and control speed of the playing .wav file

8-Jan-07 3:51

Check if PlaySound() is of any use to you.

Nobody can give you wiser advice than yourself. - Cicero
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CraZyToLearn8-Jan-07 18:40

CraZyToLearn

8-Jan-07 18:40

Hey Thanks to WhiteSky as well as Brahmma for your reply....

I have used playsound() as well as MCI controls to play wav file, but I don't want that way to play my wave files. I just want to play it through waveform audio functions.

Even I want to increase/decrease the speed of play.

CraZyToLearn

Re: How to play .wav file and control speed of the playing .wav file

S Douglas8-Jan-07 21:34

S Douglas

8-Jan-07 21:34

CraZyToLearn wrote:
I want to increase/decrease the speed of play.

Take a look here Ey Media Player[^]

I'd love to help, but unfortunatley I have prior commitments monitoring the length of my grass. :Andrew Bleakley:

Re: How to play .wav file and control speed of the playing .wav file

Hamid_RT8-Jan-07 17:44

Hamid_RT

8-Jan-07 17:44

You can use also of MCI functions for play your file Smile | :)

WhiteSky

How to play .wav file and control speed of the playing .wav file

CraZyToLearn8-Jan-07 0:49

CraZyToLearn

8-Jan-07 0:49

I want to play .wav file using WAVEFORMATEX and using the functions waveOutOpen, waveOutWrite.
I have tried it, but I could play only part of the file. And even I want to control the speed of that played file. Please Help me out.

Thanks in Advance

CraZyToLearn

CraZyToLearn Smile | :)

Re: How to play .wav file and control speed of the playing .wav file

Rajesh R Subramanian8-Jan-07 18:39

Post(Thread)Message() and System-wide hooks

8-Jan-07 18:39

Check if PlaySound() is of any use to you.

Nobody can give you wiser advice than yourself. - Cicero
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PatrykDabrowski8-Jan-07 0:18

PatrykDabrowski

8-Jan-07 0:18

Hello

I've already posted those questions but it was Sunday night so probably nobody had seen it;)

I have a DLL which installs system wide hook using SetWindowsHookEx(WH_Mouse,...), can I use normal PostMessage(main_application_hwnd_handle,...) to inform my application about some event which happend inside this DLL?? I tried it, but it seems not working. PostThreadMessage(main_application_thread_id,...) works fine. In MSDN I couldn't find any information that HWND handle in PostMessage() should belong to the calling process/thread...?

My second question is, how to capture LVM_HITTEST messages, I mean which hook could I use to capture system wide LVM_HITTEST messages? I need also WM_LMOUSEDBLCLK messages which I capture using WH_MOUSE hook. Is it possible to capture those two messages using only one hook? I've partialy solved this problem by sending LVM_HITTEST message to the hooked window from the WH_MOUSE hook, but I don't think it's 'clean' and for sure it generates additional performance hit...

Last question - how to find (in a 'safe and compatible way') HWND to the desktop window "FolderView" of class "SysListView32"? It has a handle 0x10094 but I think I can't hardcode it to my application... Now I use:

HWND h1=::FindWindowEx(NULL,NULL,"Progman","Program Manager");
HWND h2=::FindWindowEx(h1,NULL,"SHELLDLL_DefView",NULL);
m_hwnd_desktop=::FindWindowEx(h2,NULL,"SysListView32",NULL);

is it safe? (single m_hwnd_desktop=::FindWindowEx(NULL,NULL,"SysListView32","FolderView") returns NULL..?!?)

Thanks for any help (and thanks to Naveen R for answering my previous question at 5 o'clock;)

Pat.

Problem detecting Availability of Network Path

Sudhir Mangla7-Jan-07 23:53

Sudhir Mangla

7-Jan-07 23:53

I have created a program in which I need to determine the availability
of a Shared folder path.

Here is the sample code
*********************************
#include <io.h>

m_sCopyToDrive = "t:\\test\\";

if( ::_access(m_sCopyToDrive.c_str(),0) == -1)
{
AfxMessageBox("Network is Down");
return FALSE;

}

else
{
AfxMessageBox("Network is UP");

}

*****************************************

To check if the network is up I ran the following test.
If Network connected.... result imediate Message box "Network is up"
Disconnect ethernet cable from network.
Program runs and after about 3 minutes "network is down" message box
appears. It takes about another minute for function to return.

Is there any other way to test if the network path is available or not

Thanks for the help,

Sudhir Mangla

http://Programmerworld.net
AND http://DevelopersVoice.com

(Free books , articles , Source Code and Programming Tools and Utilities)

Re: Problem detecting Availability of Network Path

David Crow8-Jan-07 4:02

David Crow

8-Jan-07 4:02

I don't know if it's any quicker, but look at the ISensNetwork interface.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Question about CFileDialog class

eusto7-Jan-07 23:02

7-Jan-07 23:02

I have a dialog with two browse buttons on it. If i press the frist one, select a file than press the seccond one, my application crashes and i can't figure out why Frown | :(

. Here's the code:

//first browse button
void CAddEquipDlg::OnBnClickedBrowsedb()
{
    char szFilters[]=
        "Access DB (*.mdb)|*.mdb|All Files (*.*)|*.*||";

    CFileDialog fDlg(TRUE,
        "mdb",
        "*.mdb",
        OFN_FILEMUSTEXIST| OFN_HIDEREADONLY,
        szFilters, 
        NULL
        );
    if (fDlg.DoModal()==IDOK)
    {
        m_sDB = fDlg.GetPathName();
    }
    SetCurrentDirectory(m_sCurDir);
    SetDlgItemText(IDC_DB,m_sDB);
    AfxGetApp()->WriteProfileString("Connection", "Database",m_sDB);
}
//seccond browse button
void CAddEquipDlg::OnBnClickedBrowseequip()
{

    char szFilters[]=
        "CSV Files (*.csv)|*.csv|All Files (*.*)|*.*||";

    CFileDialog fDlg(TRUE,
        "csv",
        "*.csv",
        OFN_FILEMUSTEXIST| OFN_HIDEREADONLY,
        szFilters, 
        NULL
        );
    if (fDlg.DoModal()==IDOK)
    {
        CString bla = fDlg.GetFileTitle();
        m_sEQUIP = fDlg.GetPathName();
    }
    SetCurrentDirectory(m_sCurDir);
    SetDlgItemText(IDC_EQUIP,m_sEQUIP);    
}

It crashes two out of tree times (with a send/don't send error message in release) and this is the debug info

First-chance exception at 0x7ca5159e in AddEquip.exe: 0xC0000005: Access violation reading location 0x62883720.
Unhandled exception at 0x7ca5159e in AddEquip.exe: 0xC0000005: Access violation reading location 0x62883720.

prasad_som7-Jan-07 23:08

prasad_som

7-Jan-07 23:08

At what line it takes you in the code ? if you try to debug crash .

Prasad
Notifier using ATL | Operator new[],delete[][^]

Cedric Moonen7-Jan-07 23:09

Cedric Moonen

7-Jan-07 23:09

It's difficult to see the problem. What you can do to narrow the problem is use your debugger (press F5) to see where in your code the crash occurs. Then you can watch for the different variables and check if everything is correct.

You can also set breakpoint (press F9) before the crash to see the evolution of the variables.

Cédric Moonen
Software developer

Charting control [v1.1]

Rajesh R Subramanian7-Jan-07 23:10

7-Jan-07 23:10

Did you try debugging? Where exactly is the app crashing?

Nobody can give you wiser advice than yourself. - Cicero
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eusto7-Jan-07 23:27

7-Jan-07 23:27

The debugger does not take me to any line in my code. It crashes after the second filedialog has been displayed and all i get is a "Show disasembly" option which does nothing Frown | :(

Rajesh R Subramanian7-Jan-07 23:38

7-Jan-07 23:38

How can that happen! I hope you have set break points. Have you?

Nobody can give you wiser advice than yourself. - Cicero
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eusto8-Jan-07 0:25

8-Jan-07 0:25

where do you want me to set brakepoints? i've set them for every line in my code but the application dies while browsing for the file (ie: CFileDialog::DoModal() never returns)

Roger Stoltz8-Jan-07 0:40

Roger Stoltz

8-Jan-07 0:40

What does the call stack look like?
Is there any line that points to code for which you have source code?

I assume you have built your application for debug... Unsure | :~

--
Rog

eusto8-Jan-07 1:53

8-Jan-07 1:53

no...debug does not point to my code Frown | :(