Re: Two successive dialogs in a dlg app - C / C++ / MFC Discussion Boards

David Crow29-Oct-04 4:24

29-Oct-04 4:24

P_JAYAPRAKASH wrote:
I think WaveOutVolume is for "WaveOut" devices not for wavein.

Fair enough. As my article indicates, I'm not an audio aficionado.

"Opinions are neither right nor wrong. I cannot change your opinion of me. I can, however, change what influences your opinion." - David Crow

Cliping sound file

RamiQadi27-Oct-04 1:37

RamiQadi

27-Oct-04 1:37

Hi,

Im trying to develop an application that has some sound processing issues, i need to clip a sound file and put the output in another sound file of the same format. How can i achieve this issue. What libraries and classes i need to use to accomplish that ??

C++ WMI

torben0027-Oct-04 1:23

torben00

27-Oct-04 1:23

Hi,
I´m using C++ and WMI to get hold of information from my network cards. The problem is that I only recieve information of my primary, Ethernet network card. I´m intrested to get information from both my primary and my wireless network card. When executing ExecuteQuery() with the query "Select * from win32_NetworkAdapter", is there anyway that I can get that into a list of "network adapters". Possible this already is done and put into the list object sent to exec.query, but I can´t get more than one item from it, even if my wireless network card is actice.

Does somebody have a clue of a solution of my problem. If I have been fuzzy in my description of the problem I can explain it more and hopefully better.

Torben00

How to get the path of a file in VC++

ledallam27-Oct-04 1:12

ledallam

27-Oct-04 1:12

Hi,

I want to find the path of a file for example test.xml.
If test.xml is located in C:\Temp\Data\test.xml, then by giving the file name (test.xml) as input, I want the path as output i.e C:\Temp\Data

Can anyone please help me to do this?

Thanks
Madhavi.

Re: How to get the path of a file in VC++

sarath_babu27-Oct-04 1:40

sarath_babu

27-Oct-04 1:40

hi,
use the win32findfile data strcture an use cfindfile class mfc or findfile apis

Two successive dialogs in a dlg app

CaesarCZ27-Oct-04 1:01

CaesarCZ

27-Oct-04 1:01

Hello,
I'd like to run two successive dialogs in my dialog application. The problem is that when the user exits the first one and the application tries to run the second, it fails (I suspect the message pump gets destroyed).

I've tried creating a dummy window (so that there would always be at least one message target) before running the first dialog but that didn't help)

Any helps? Can I re-ren the pump again or prevent it from ceasing?

Thanks

Re: Two successive dialogs in a dlg app

wb27-Oct-04 1:24

27-Oct-04 1:24

show the code.

Re: Two successive dialogs in a dlg app

CaesarCZ27-Oct-04 1:38

CaesarCZ

27-Oct-04 1:38

dlg = new CPoolDlg;
m_pMainWnd = dlg;
int nResponse = dlg->DoModal();

delete dlg;

playoff_dlg = new CPlayoffDlg;
m_pMainWnd = playoff_dlg;

nResponse = playoff_dlg->DoModal();

delete playoff_dlg;

That's the code in InitInstance. I have to say I'm in no way a MFC guru. I played with the code a bit to make the CPoolDlg and CPlayoffDlg members of the CMyApp, and had to make them * in order to be able to create them after the common controls initialization is done. If I comment the first dialog out, the second runs wo problems, if I don't, the DoModal returns -1 (from what I know on some message pump checking call)

Re: Two successive dialogs in a dlg app

wb27-Oct-04 2:14

27-Oct-04 2:14

search in the MSDN for Q138681
or just comment the m_pMainWnd lines out.

dlg = new CPoolDlg;
//m_pMainWnd = dlg;
int nResponse = dlg->DoModal();

delete dlg;

playoff_dlg = new CPlayoffDlg;
//m_pMainWnd = playoff_dlg;

nResponse = playoff_dlg->DoModal();
delete playoff_dlg;

Re: Two successive dialogs in a dlg app

Antony M Kancidrowski27-Oct-04 2:25

Antony M Kancidrowski

27-Oct-04 2:25

The problem you have is that you are setting the m_pMainWin to be a pointer to your first dialog.

MFC automatically terminates the thread (your application) when the window that m_pMainWnd is pointing to is closed. For further information see MSDN.

You could change the code to:

dlg = new CPoolDlg;
playoff_dlg = new CPlayoffDlg;
m_pMainWnd = playoff_dlg;

int nResponse = dlg->DoModal();

delete dlg;

nResponse = playoff_dlg->DoModal();

delete playoff_dlg;

Which will ensure that the application lives for the duration of the second dialog.

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 Walliams (Little Britain)

Re: Two successive dialogs in a dlg app

CaesarCZ27-Oct-04 3:05

CaesarCZ

27-Oct-04 3:05

Thank you both guys, it works now Smile | :)

3D Pipe Graph creation in VC++(MFC)

Venkata Krishnan Naidu27-Oct-04 0:49

Venkata Krishnan Naidu

27-Oct-04 0:49

How should we create 3 Dimensional Graph(Pipe) in VC++ Using MFC?
For example if we give pipe length, breadth, radious How should we draw 3D Pipe?

K.V.K.Naidu

DiskQuotaControl

std770227-Oct-04 0:47

std7702

27-Oct-04 0:47

Hello!
Within a C++ program I need to get the disk quota for all users on a window-machine. I found the IDiskQuotaControl interface, which seems to be the right tool for this task, but I'm not sure how to use it properly (there are no examples in the msdn). Can anyone help me with this?

Thank you very much,
Markus

Re: DiskQuotaControl

David Crow27-Oct-04 3:01

David Crow

27-Oct-04 3:01

std7702 wrote:
I found the IDiskQuotaControl interface...but I'm not sure how to use it properly (there are no examples in the msdn). Can anyone help me with this?

How about:

HRESULT             hr;
IDiskQuotaControl   *pIDiskQuotaControl;
 
hr = CoInitialize(NULL);
if (SUCCEEDED(hr))
{
    hr = CoCreateInstance(CLSID_DiskQuotaControl, NULL, CLSCTX_INPROC_SERVER, IID_IDiskQuotaControl, (void **) &pIDiskQuotaControl);
    if (SUCCEEDED(hr))
    {
        ...
        pIDiskQuotaControl->Release();
    }
 
    CoUninitialize();
}

"Opinions are neither right nor wrong. I cannot change your opinion of me. I can, however, change what influences your opinion." - David Crow

Re: DiskQuotaControl

std770228-Oct-04 1:34

std7702

28-Oct-04 1:34

This looks good, thank you!

activex ctrl in modeless dialog

sarath_babu27-Oct-04 0:28

sarath_babu

27-Oct-04 0:28

I am using a modeless dialog box with activex controls. If I remove the activex controls then it is working correctly otherwise it is giving assertion failure error

At the line containing dialogboxname.ShowWindow() function.

Tell me what is wrong.

babu

Re: activex ctrl in modeless dialog

Cedric Moonen27-Oct-04 1:25

Cedric Moonen

27-Oct-04 1:25

If the code is no too long, post the .h and .cpp files from your dialog class. This can help us a lot Smile | :)

activex ctrl in modeless dialog

sarath_babu27-Oct-04 0:27

sarath_babu

27-Oct-04 0:27

CFile

vc-programmer-26-Oct-04 22:28

vc-programmer-

26-Oct-04 22:28

how to update CFile in vc++.
i want to change data.

(for example)
//existing data
dataid=1
datades=data1

//updating data
dataid=1
datades=dataone

CFile is like as sql have new,delete,update.
i know only create file, read file.
i don't know update file.
vc++ have update file or not.

Re: CFile

ytod26-Oct-04 22:44

ytod

26-Oct-04 22:44

The Simplest way to do so is to open the file again and then write your new data. Actually, I always did so in the following way...;P

SOMETYPE SomeFunction()
{
CFile l_File; // local CFile object
l_File.Open( "C:\\FileName.txt",
CFile::modeCreate | CFile::modeReadWrite );
// using the open flags CFile::modeCreate OR CFile::modeReadWrite
// wrting your file by calling CFile::Write()
...
}

Re: CFile

vc-programmer-26-Oct-04 22:59

vc-programmer-

26-Oct-04 22:59

Sir...
my existing create code is following..
void ARMManagementRecords::SaveDomains()
{
// For domains
BOOL bCanSave = FALSE;

UINT nFlags = CFile::typeBinary | CFile::modeWrite;

// file doesn't exist, so create it
if (_access(DATA_FILE_DOMAIN, 0))
{
nFlags |= CFile::modeCreate;
bCanSave = TRUE;
}
else
{
bCanSave = CanSerializeDomain();
}

if (bCanSave)
{
CFile file;
CFileException fe;

// file exists with read & write permissions
if (file.Open(DATA_FILE_DOMAIN, nFlags, &fe))
{
CArchive arDomain(&file, CArchive::store);
//CStringArray m_domainArray;
m_domainArray.Serialize(arDomain);
}

file.Close();
}
}

Re: CFile

vcplusplus27-Oct-04 3:10

vcplusplus

27-Oct-04 3:10

vc-programmer- wrote:
CFile is like as sql have new,delete,update.

Here is a list of all the methods for CFile.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_mfc_cfile_class_members.asp[^]

implicit pointer conversion

pesho293226-Oct-04 21:55

pesho2932

26-Oct-04 21:55

does anybody have an idea why c++ would not allow the following:

const char * * cp = NULL;
char * * p = NULL;

cp = p;

i'm getting really disappointed by the language... only intelligent ideas, please! D'Oh! | :doh:

Re: implicit pointer conversion

geo_m26-Oct-04 23:14

geo_m

26-Oct-04 23:14

because if this would be allowed, you'll be able to modify the const objects.
See:

<br />
const char p1 = 'a'; //constant it should never change<br />
char* p2;<br />
const char** p3 = &p2;    // this is illegal<br />
*p3 = &p1;    // now p3 points to 'a'<br />
*p2 = 'b'; // now we have modified 'a'<br />

Normally C++ standard allows you to cast from char* to const char* as it only adds the const. But the conversion from char** to const char** is problematic as you can see above.

[example taken from compl.lang.c++]

Re: implicit pointer conversion

pesho293227-Oct-04 0:13

pesho2932

27-Oct-04 0:13

ok.. i see now.. thanks

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