C / C++ / MFC

Hamid_RT17-Jul-08 0:23

Hamid_RT

17-Jul-08 0:23

See Audio Mixer Functions Demo[^].

ritz123417-Jul-08 0:49

ritz1234

17-Jul-08 0:49

Thanks for the help Hamid Rose | [Rose]

I've checked the exe's for mute and volume control and it works.I'll integrate it with my application.

But what about the play/pause?

Thanks very much.

ritz1234

Hamid_RT17-Jul-08 1:18

Hamid_RT

17-Jul-08 1:18

Play and puase of other programs or your program?

ritz123417-Jul-08 1:33

ritz1234

17-Jul-08 1:33

As in the windows xp media player we can play/pause the song this what I want should be handled from the application.

ritz1234

Mark Salsbery17-Jul-08 7:59

Mark Salsbery

17-Jul-08 7:59

play/pause is for devices, not for sound.

For those, maybe look into Waveform Audio[^], MCI[^], or DirectX Audio[^].

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

David Crow17-Jul-08 3:17

David Crow

17-Jul-08 3:17

ritz1234 wrote:
3)Adjustring the system volume.

How can I do these things?

Here is one example.

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

sprintf_s problem

tataxin16-Jul-08 22:33

16-Jul-08 22:33

hi, I have a sql in my program. What I want is exactly like this:

select * 
from tbl t
where t.name like '%xyz%'

So in source code, I create sql like this:

CString name = "xyz";
::sprintf_s(szQuery, "	select * from tbl t where t.name like '%%%s%%' ", name);

Here is szQuery when I execute

select * 
from tbl t
where t.name like '%x%'

Just the first character is printed into szQuery.
What's wrong here? what should I do??

Thank you in advance.

Cedric Moonen16-Jul-08 22:46

Cedric Moonen

16-Jul-08 22:46

Do you have UNICODE enabled ?

Cédric Moonen
Software developer

Charting control [v1.4]
OpenGL game tutorial in C++

tataxin16-Jul-08 22:49

16-Jul-08 22:49

yes, Cedric. It's a Unicode project. In Project properties, The Character Set is "Use Unicode Character Set"
is that wrong?

Re: sprintf_s problem [modified]

Cedric Moonen16-Jul-08 22:55

Cedric Moonen

16-Jul-08 22:55

Then you have to specify %S instead of %s. CString will return a wide-character string since UNICODE is enabled. If you look at the format specification[^] you can see that %S tells printf that the string is a wide-char string (when used with printf alike functions).

Cédric Moonen
Software developer

Charting control [v1.4]
OpenGL game tutorial in C++

tataxin16-Jul-08 22:52

16-Jul-08 22:52

Thank you, Cedric.
I just change the Character Set property to "Use Multi-Byte Character Set" and it's ok now

modified on Thursday, July 17, 2008 9:40

Naveen16-Jul-08 22:53

16-Jul-08 22:53

I think your project is a unicode project. So the CString will be holding a pointer to unicode string. So you the following options.

1. use _stprintf_s() intead of sprintf_s( in this case szQuery also need to be TCHAR* or TCHAR[] ) or
2. Use CStringA instead of CString or
3. Convert CString content to multibyte characters using WideCharToMultiByte() API.
4. Undef _UNICODE.

nave

[OpenedFileFinder]

Cedric Moonen16-Jul-08 22:57

Cedric Moonen

16-Jul-08 22:57

5. Or simply use %S instead of %s Big Grin | :-D

Cédric Moonen
Software developer

Charting control [v1.4]
OpenGL game tutorial in C++

tataxin17-Jul-08 3:47

17-Jul-08 3:47

nice!!
If we use "Use Multi-Byte Character Set", it should be "%s".
Or if we use "Use Unicode Character Set", it should be "%S".

Thank you, Cedric!!

tataxin17-Jul-08 3:59

A problem with Diamond problem

17-Jul-08 3:59

I will try them now. At least the option 2 works
There 're many functions similar to each other. It's so messy, and not easy to understand .... Frown | :(

Thank you, Naveen.

thenewbee16-Jul-08 21:40

16-Jul-08 21:40

I have a base class A which is being inherited later & in one inherited class i had OVERLOADED one of the base class function.
The code snippet is given below.

class A{

public:

virtual void fun(){
cout<<"A";
}
};

class B: virtual public A{
public :

void fun(){
cout<<"k";
}
};

class C: virtual public A{

public:
int fun(int num){
cout<<"C";
}
};

class D: public C, public B{

};

void main(){
D dObj;
dObj.fun(4);
}

Can anyone tell me why i am getting an "ambigous" error in the fn call?

Naveen16-Jul-08 22:45

16-Jul-08 22:45

thenewbee wrote:
dObj.fun(4);

The error came because the compiler (me also)dosent understand which function it should actually call. function of A, or B or C. Actually which class' function do u expect to get executed?

nave

[OpenedFileFinder]

thenewbee17-Jul-08 1:27

17-Jul-08 1:27

The call dObj.fun(4) shld call C::fun(int)
Thats wt we had learned from the concept of Overloading. .
Am i correct??

Naveen17-Jul-08 4:51

17-Jul-08 4:51

thenewbee wrote:
Am i correct??

no. First can u tell me why didnt you expect B::fun(int) to get called. Both B and C are base classes of D. Isnt it..? is it because C is your favourite Laugh | :laugh:

nave

[OpenedFileFinder]

thenewbee17-Jul-08 22:54

17-Jul-08 22:54

virtual void fun(){
cout<<"A";
}
};

class B: virtual public A{
public :

void fun(){
cout<<"k";
}
};

Its not becoz C is my Fav. . Smile | :)

The base class B dont have fun(int). But C have.
& how will B get the fun(int)??

thenewbee21-Jul-08 18:17

Why some MESSAGES don't show in the MESSAGE MAPS tab in the ClassWizard?

21-Jul-08 18:17

???

fantasy121516-Jul-08 21:32

fantasy1215

16-Jul-08 21:32

First state my invironments: OS xp sp2, vc6.0
I create a dialog based MFC program, in the CMyDlg class, I type CTRL+W to invoke the ClassWizard,
I couldn't find some messages like
WM_NCHITTEST, WM_ENDSESSION, WM_QUERYENDSESSION
messages in the MESSAGE MAPS.
I should manually add these message handles.
Does anyone knows why?

Re: Why some MESSAGES don't show in the MESSAGE MAPS tab in the ClassWizard?

Naveen16-Jul-08 21:48