C / C++ / MFC

Re: How to read Windows Message

27-May-04 4:37

louis wrote:
Now I want to read this same message using my beloved Visual C++ code.

Just provide a message handler for the message that is being broadcast. Put the handler in between BEGIN_MESSAGE_MAP() and END_MESSAGE_MAP().

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

louis28-May-04 2:16

louis

28-May-04 2:16

Thanks,

I have done so. That part works.
I am still not able to update my listview with the new data. The program gives an application error.

One more question. How do I read the handle of the application.

Thanks again.
Cheers

Re: How to read Windows Message

David Crow28-May-04 2:36

GetExitCodeProcess exit code always 0 on Win98

28-May-04 2:36

louis wrote:
I am still not able to update my listview with the new data.

What does the code look like that is doing the updating?

louis wrote:
The program gives an application error.

And that error would be?

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

sexywetdeath27-May-04 3:55

sexywetdeath

27-May-04 3:55

I start a process using:

PROCESS_INFORMATION ProcessInfo = {0};
STARTUPINFO StartupInfo = {0};
bResult = CreateProcess(NULL, pszCommandLine, NULL, NULL, TRUE, 0, NULL, NULL, &StartupInfo, &ProcessInfo);

I then wait for it to finish using:

nNum = WaitForSingleObject(ProcessInfo.hProcess, INFINITE);

After I'm sure the process has finished I use:

DWORD nExitCode=0;
GetExitCodeProcess(hProcess, &nExitCode);

The call always succeeds and on most platforms gives the correct exit code. However, on Windows 98 the exit code is always 0. No matter what the executable specified in pszCommandLine actually returns.

To test this I used a very simple Win32 console application (that just exits with an error code other than 0) as my process.

Does anyone have any ideas why GetExitCodeProcess might always give the 0 exit code on windows 98?

Re: GetExitCodeProcess exit code always 0 on Win98

Alexander ^M.,27-May-04 8:32

Alexander ^M.,

27-May-04 8:32

check if GetExitCodeProcess returns a nonzero value. if not, then GetLastError!

Don't try it, just do it! Wink | ;-)

how to use a lib file?

FASTian27-May-04 3:45

FASTian

27-May-04 3:45

i have added the lib file to Object/Library modules: but when i compile the project i am getting this error LNK2001: unresolved external symbol _Px_SetOutputVolume i am not sure why this is happening any ideas how i should deal with this?

thanks

David Crow27-May-04 3:57

27-May-04 3:57

Are you using the correct .lib file that contains Px_SetOutputVolume()?

Have you searched MSDN for LNK2001 and all the many reasons that can cause it?

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

Alexander ^M.,27-May-04 8:36

Alexander ^M.,

27-May-04 8:36

there are many possibilities for this error, but the most common ones are these:
1. the function is not included in the lib file
2. the declaration of the function does not match with the definison by the linker

Don't try it, just do it! Wink | ;-)

FASTian30-May-04 21:19

FASTian

30-May-04 21:19

nopes still no luck in getting it working Frown | :(

anyways thanks for your help guys...
anyways downloaded the library and code from
if anybody can download it from http://iaxclient.sourceforge.net/iaxcomm/iaxcomm-win-20040228.zip
and give me some tips of using it in Visual C++ i will be greatfull..
its basically a open source softphone library using IAX protocol..
the library compiles ok...i just cant seem to be able to use the library in my other projects.

Thanks

mirex28-May-04 2:54

mirex

28-May-04 2:54

might be also that .lib is not included Smile | :)

check lib path.

Mapping array of CButtons

Alexander ^M.,28-May-04 5:14

Alexander ^M.,

28-May-04 5:14

when he gave the command of using the lib, then the linker gives an error message if it doesnt find the lib.

Don't try it, just do it! Wink | ;-)

dart1327-May-04 3:10

27-May-04 3:10

How to map array of CButtons to button resources on Dialog form?

David Crow27-May-04 3:10

27-May-04 3:10

Have you looked at CMap?

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

dart1327-May-04 3:34

27-May-04 3:34

I looked in MSDN, but I'm not quite sure if I know how to use it in this case.

David Crow27-May-04 3:52

27-May-04 3:52

dart13 wrote:
I looked in MSDN, but I'm not quite sure if I know how to use it...

"It" being MSDN or the CMap class?

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

dart1327-May-04 4:07

27-May-04 4:07

It being CMap. Sorry for misunderstanding.

David Crow27-May-04 4:34

27-May-04 4:34

Something like:

CMap<int,int,CButton*,CButton*> mapButtons;
 
mapButtons.SetAt(123, &m_btn1);
mapButtons.SetAt(456, &m_btn2);
mapButtons.SetAt(789, &m_btn3);
 
CButton *btn;
BOOL bFound;
bFound = mapButtons.Lookup(123, btn);
bFound = mapButtons.Lookup(234, btn);

Think of a map as a cross-reference.

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

dart1327-May-04 4:58

27-May-04 4:58

Thanks for your help, but shoudn't DoDataExchange() be in some way involved in this?
I have an array CButton btns[10] that need to be 'connected' to 10 buttons on a dialog form. If I use ClassWizard (Member Variables) I can map each button with a single CButton variable, but it doesn't allow me to use btns[0], for example, as a name of a variable.

Blake Miller27-May-04 5:30

Blake Miller

27-May-04 5:30

You can bypass ClassWizard and code assignments in DoDataExchange by hand. Just leave your 'manual' assignments out of the special code section delimited by
//{{AFX_DATA_MAP(<dialogclassname>)
//}}AFX_DATA_MAP

I do this all the time for custom DDV routines not built into ClassWizard or to make special assignment like you need.

You can try:

//{{AFX_DATA_MAP(<dialogclassname>)
//}}AFX_DATA_MAP

DDX_Control(pDX, ID_BTN_0, btns[0]);
DDX_Control(pDX, ID_BTN_1, btns[1]);
...

And that should work.
ClassWizard is the only thing that requires each button variable to be a separate member variable, the DDX_Control function does not care.

dart1327-May-04 6:54

27-May-04 6:54

thanx for your help. I appreciate it.