C / C++ / MFC Discussion Boards

Chris Hambleton11-Oct-02 2:30

11-Oct-02 2:30

Create a modeless dialog using Create() and ShowWindow() (see MSDN), and then change the dialog's zorder

"If at any time I announce that a nation or kingdom is to be uprooted, torn down and destroyed, and if that nation I warned repents of its evil, then I will relent and not inflict on it the disaster I had planned. And if at another time I announce that a nation or kingdom is to be built up and planted, and if it does evil in my sight and does not obey me, then I will reconsider the good I had intended to do for it." -- Jeremiah 18:7-10 (God, commenting on the value of the United Nations)

DirectSound question

pankajdaga11-Oct-02 1:37

pankajdaga

11-Oct-02 1:37

Hi,

I was going through the DirectSound samples that come with DirectX SDK. In the file dsutil.cpp I came across the following function:

//--------------------------------------------------------------------------
// Name: CSoundManager::SetPrimaryBufferFormat()
// Desc: Set primary buffer to a specified format
// For example, to set the primary buffer format to 22kHz stereo, 16-bit
// then: dwPrimaryChannels = 2
// dwPrimaryFreq = 22050,
// dwPrimaryBitRate = 16
//--------------------------------------------------------------------------
HRESULT CSoundManager::SetPrimaryBufferFormat( DWORD dwPrimaryChannels,
DWORD dwPrimaryFreq,
DWORD dwPrimaryBitRate )
{
HRESULT hr;
LPDIRECTSOUNDBUFFER pDSBPrimary = NULL;

if( m_pDS == NULL )
return CO_E_NOTINITIALIZED;

// Get the primary buffer
DSBUFFERDESC dsbd;
ZeroMemory( &dsbd, sizeof(DSBUFFERDESC) );
dsbd.dwSize = sizeof(DSBUFFERDESC);
dsbd.dwFlags = DSBCAPS_PRIMARYBUFFER;
dsbd.dwBufferBytes = 0;
dsbd.lpwfxFormat = NULL;

if( FAILED( hr = m_pDS->CreateSoundBuffer( &dsbd, &pDSBPrimary, NULL ) ) )
return DXTRACE_ERR( TEXT("CreateSoundBuffer"), hr );

WAVEFORMATEX wfx;
ZeroMemory( &wfx, sizeof(WAVEFORMATEX) );
wfx.wFormatTag = WAVE_FORMAT_PCM;
wfx.nChannels = (WORD) dwPrimaryChannels;
wfx.nSamplesPerSec = dwPrimaryFreq;
wfx.wBitsPerSample = (WORD) dwPrimaryBitRate;
wfx.nBlockAlign = (WORD) (wfx.wBitsPerSample / 8 * wfx.nChannels);
wfx.nAvgBytesPerSec = wfx.nSamplesPerSec * wfx.nBlockAlign;

if( FAILED( hr = pDSBPrimary->SetFormat(&wfx) ) )
return DXTRACE_ERR( TEXT("SetFormat"), hr );

SAFE_RELEASE( pDSBPrimary );

return S_OK;
}

This is called after calling DirectSoundCreate8() and setting the CooperationLevel. Apparantly, this sets the format of the primary buffer. The question that I have is why is the primary buffer released after setting the format? Should we not keep a reference to the primary buffer? Or maybe I am not understanding something here.

Thanks for any help you might be able to provide.

Pankaj

Without struggle, there is no progress

Re: DirectSound question

pankajdaga11-Oct-02 3:11

pankajdaga

11-Oct-02 3:11

Ok, I got it. I somehow thought it was destroying the primary buffer. Of course, it was just decrementing the reference count.

It was late at night and I was not thinking. Amazing how a hours of sleep can make you realize how stupid you wer ebefore that Big Grin | :-D

Pankaj

Without struggle, there is no progress

Another Problem DialogBox

suresh_sathya11-Oct-02 1:31

suresh_sathya

11-Oct-02 1:31

I show my dialogbox.When i press close,iam closing the dialog box by using func called enddialog.If i open and close the dialog box again and again,the memory size at runtime is increasing.I dont know why.

Re: Another Problem DialogBox

Rickard Andersson²⁰11-Oct-02 1:57

Rickard Andersson²⁰

11-Oct-02 1:57

Two possible reasons:

1: MFC

2: Your own code

Do you allocate memory or something?

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

Re: Another Problem DialogBox

Jon Hulatt11-Oct-02 3:48

Jon Hulatt

11-Oct-02 3:48

Sounds like you're doing this to show your dialog:-

CMyDialog *pDlg = new CMyDialog;
pDlg->DoModal();

if that is the case, make sure that you have:-

delete pDlg;

after the domodal.

But, provided the dialog is modal, you'd be far better off doing:-

CMyDialog dlg;
dlg.DoModal();

becuase then you don't need to delete it.

Jon

Signature space for rent. Apply by email to....

Microsoft RAS server

_Yarrr_11-Oct-02 0:51

_Yarrr_

11-Oct-02 0:51

Tell me please, how can I launch standart microsoft remote access server ( ) programmatically?

Re: Microsoft RAS server

jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj11-Oct-02 5:01

jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj

11-Oct-02 5:01

Please, answer me. Don't leave me alone with this problem.

Resources in EXE

candan11-Oct-02 0:09

candan

11-Oct-02 0:09

I want add or del the resources in EXE files. I know I can do it in VC if I have sourcecode. But is there any tool to do this ? Or I can write a easy tool to do this ? Please give me some hints and Thx.

Re: Resources in EXE

Pavel Klocek11-Oct-02 0:55

Pavel Klocek

11-Oct-02 0:55

You can do this in VS6 IDE this way:
1) Call OpenFile dialog from menu File/Open...
2) In Files of type combo select Executable files
3) In Open as combo select Resources
4) After you open the executable file with these settings, you can edit the resources as usual.
5) Save the modified resources back into exe using save.

Watch for copyrights doing it Wink | ;)

Pavel
Sonork 100.15206

Re: Resources in EXE

candan13-Oct-02 14:31

candan

13-Oct-02 14:31

Thank you. Smile | :)

Re: Resources in EXE

Gary R. Wheeler11-Oct-02 16:26

Gary R. Wheeler

11-Oct-02 16:26

Look for UpdateResource in the MSDN.

Gary R. Wheeler

static member in dll

Kainy11-Oct-02 0:05

Kainy

11-Oct-02 0:05

I have a dll using MFC7 (.NET)
To export the functions from my class to the dll, I use the keywords __declspec(dllexport) (see code below).
In my class I have a static member.
My problem is that I can't have access to my static member from an external application using the dll. There is the below error:
Application error LNK2020: token not solved (0A000022) ?version@CIO@@2PBDB
How to have access to the static member from an external application????

<br />
class __declspec(dllexport) CIO<br />
{<br />
public:    <br />
     CIO();<br />
     ~CIO();<br />
<br />
public:<br />
    static const char* version;<br />
<br />
};<br />

Re: static member in dll

Stephane Rodriguez.11-Oct-02 0:19

Stephane Rodriguez.

11-Oct-02 0:19

class __declspec(dllimport) CIO

She's so dirty, she threw a boomerang and it wouldn't even come back.

Re: static member in dll

Paul M Watt11-Oct-02 5:54

Paul M Watt

11-Oct-02 5:54

Usually how people solve this problem is by making a define that gets changed depending on how the DLL is used. Something like this:

<br />
#ifdef CIO_EXPORTS<br />
#define CIO_API __declspec(dllexport)<br />
#else<br />
#define CIO_API __declspec(dllimport)<br />
#endif<br />

So in your project where you compile your DLL, besure to define CIO_EXPORTS, and your class and static members will be exported. In all other cases (like the project where you want to import the DLL) the setting will be set to import those parameters.

Good Luck

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!

Dialog box

suresh_sathya10-Oct-02 23:50

suresh_sathya

10-Oct-02 23:50

In my application when i right-click on the window i invoke a popup menu.when i click the popup menu, dialog box is displayed.I am not closing my dialog box and i switch to another application.When i click on my application name again in the taskbar, there is no reponse from my application. i have to minimize all my application to open my application again.How to correct this.

Re: Dialog box

Rickard Andersson²⁰10-Oct-02 23:59

Rickard Andersson²⁰

10-Oct-02 23:59

I think it is when you have an modal dialog box open (is it a modal dialog box?).
Then when you as you do to give it focus you can't give it focus because you have an modal dialog box open....

I only think it could be that... I'm not sure! Smile | :)

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

Re: Dialog box

suresh_sathya11-Oct-02 0:24

suresh_sathya

11-Oct-02 0:24

Yes iam using modal Dialog Box.How to create modeless dialog box.

Re: Dialog box

Jon Hulatt11-Oct-02 0:56

Jon Hulatt

11-Oct-02 0:56

Step 1 is to look in MSDN.
Step 2,3 and 4 are listed in MSDN.

Signature space for rent. Apply by email to....

Re: Dialog box

Pavel Klocek11-Oct-02 0:57

Pavel Klocek

11-Oct-02 0:57

Is the parent window of your popup dialog set?

Pavel
Sonork 100.15206

Re: Dialog box

suresh_sathya11-Oct-02 1:29

suresh_sathya

11-Oct-02 1:29

I correct that error.Thanks to all

how to realize a fuction of Gdi+ "DrawCurve"

zhangyifei10-Oct-02 23:28

zhangyifei

10-Oct-02 23:28

the gdiplus draw a spline line through some pots,how can i do that fuction
like Graphic::DrawCurve(...)
thanks very much!

ZHANGYIFEI

Re: how to realize a fuction of Gdi+ "DrawCurve"

Rickard Andersson²⁰10-Oct-02 23:54

Rickard Andersson²⁰

10-Oct-02 23:54

Do you mean how you could use a similary function in C++ Win32 API??

Why not use the Graphics object and MC++? Smile | :)

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

Re: how to realize a fuction of Gdi+ "DrawCurve"

Anonymous13-Oct-02 15:22

Anonymous

13-Oct-02 15:22

i mean how gdi+ do it,i mean gdi+ drawCurve's source!

Callback/Handle

stevenson10-Oct-02 21:36

stevenson

10-Oct-02 21:36

hi,
Roles:
a DLL, a Callback function and an Exe.

Activity:
sending a CListCtrl's Handle through Callback Parameter list to DLL for displaying coming data from COM1.

Precodition:
the CListCtrl has three columns, no problem in Dialog

Subsequence:
can only insert data into Item, not SubItems, in the columns of CListCtrl in Callback function.

Question:
what's happening?
How to insert data into SubItems as well?

Addition:
Thanks in advance

Extreme programming. Do the No.1

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.