C / C++ / MFC Discussion Boards

Re: How do i transfer data to a property page?

twing14-Oct-03 17:47

twing

14-Oct-03 17:47

Use Messages defined by oneself.

And SendMessage(...);

Hello World!

Re: How do i transfer data to a property page?

fynox14-Oct-03 19:24

fynox

14-Oct-03 19:24

Erm...i'm nt too familiar with that...Could u elaborate? So do i need to specify where the message is sent to or where it is sent from etc? Thanks!

Read all files in a specified directory

hkl14-Oct-03 12:04

hkl

14-Oct-03 12:04

Hi,

I am using VC++ 6.0 to write a Win32 console app. Does anyone know how I can read all the file names in a directory if user specifies the directory for input file(s)?
Thanks a lot!

Re: Read all files in a specified directory

Joel Holdsworth14-Oct-03 12:20

Joel Holdsworth

14-Oct-03 12:20

try doing...

_finddata_t fileinfo;
long hFile;


_chdir( --dirname-- );


if( (hFile = _findfirst( "*", &fileinfo )) == -1L )
   --- no files in director ---
else
{
   do
   {
      --- called per file ---
      fileinfo.name contains the filname!

   } while( _findnext( hFile, &fileinfo ) == 0 );

   _findclose( hFile );
}

*¨¨`)
¸¸.·´ ¸.·*¨¨`)
(¸¸.·* ¸ .·*
¸¸.·*
(¸¸.~~> Joel Holdsworth.

Re: Read all files in a specified directory

hkl14-Oct-03 12:51

hkl

14-Oct-03 12:51

Wow~! Thanks so much, guys!

Joel Holdsworth wrote:
_chdir( --dirname-- );

May I know what _chdir is? or what it means?
Is it part of the fileinfo structure?
Because I got an error msg for this.

thanks again. Big Grin | :-D

Re: Read all files in a specified directory

David Crow15-Oct-03 7:59

David Crow

15-Oct-03 7:59

hkl wrote:
May I know what _chdir is? or what it means?

It changes to the specified directory (i.e., CWD).

Five birds are sitting on a fence.
Three of them decide to fly off.
How many are left?

Re: Read all files in a specified directory

vcplusplus14-Oct-03 12:25

vcplusplus

14-Oct-03 12:25

CFileFind finder;
BOOL bWorking = finder.FindFile("*.*");
while (bWorking)
{
   bWorking = finder.FindNextFile();
   cout << (LPCTSTR) finder.GetFileName() << endl;
}

Re: Read all files in a specified directory

hkl14-Oct-03 12:54

hkl

14-Oct-03 12:54

Thanks. But CFileFind doesn't work in my case.
I am only writing a console app, not MFC.
(Or may be CFileFind can apply, but I don't know how.) Smile | :)

Re: Read all files in a specified directory

georgiek5014-Oct-03 15:09

georgiek50

14-Oct-03 15:09

Try this:

HANDLE hFile;
WIN32_FIND_DATA wfd;

hFile = FindFirstFile("*.*", &wfd);

while ( FindNextFile(hFile, &wfd) != 0 )
{
     // your code here
     
     // include this is if you don't want the '.' and '..' to show up

     if ( (strcmp(wfd.cFileName, "..") != 0 ) && (strcmp(wfd.cFileName, ".")  != 0 )
             // your code here eg. cout << wfd.cFileName << endl;

    // include something like this if you don't want the directories:
    if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
        // your code here eg. continue;
}

FindClose(hFile)

Re: Read all files in a specified directory

alex.barylski14-Oct-03 19:23

alex.barylski

14-Oct-03 19:23

Might wanna look at:
http://www.codeproject.com/file/sadirread.asp[^]

I'm drinking triples, seeing double and acting single Cool | :cool:

Network Spy ( Internet Spy )

asd175314-Oct-03 11:47

asd1753

14-Oct-03 11:47

hi I want to spy all packets that my computer recieving from internet or network ,

are there any one help me and have a sample code ?

thanls alot

Re: Network Spy ( Internet Spy )

pma14-Oct-03 20:16

pma

14-Oct-03 20:16

go to http://winpcap.polito.it for more details !

Ending one application from within another

georgiek5014-Oct-03 11:45

georgiek50

14-Oct-03 11:45

I have an app which start up another exe file at some point and what I am looking to do is have the newly opened program close down the program that started it. Is this possilbe to do without closing both programs? Win32 please.

Re: Ending one application from within another

Michael Dunn14-Oct-03 18:00

Michael Dunn

14-Oct-03 18:00

There are various IPC methods. The simplest would be to pass the first app's main window handle on the command line of the second app. The second can then post a WM_CLOSE message to the first.

--Mike--
Ericahist | CP SearchBar v2.0.2 | Homepage | RightClick-Encrypt | 1ClickPicGrabber
Actual sign at the laundromat I go to: "No tinting or dying."

LNK2005

jimNLX14-Oct-03 11:31

jimNLX

14-Oct-03 11:31

I get this error for many different symbols and it says that they are already defined in func.obj

func.obj is a self contained file that does define these vars, but isn't used or call be the ones that the error is generated from.

So basically I have func.cpp that defines x then I have func1.cpp and it defines x. These are local to their files why would I get this error?

Thanks for the help

Re: LNK2005

Ravi Bhavnani14-Oct-03 11:57

Ravi Bhavnani

14-Oct-03 11:57

Because they're global in scope, the linker detects the duplicate symbol "x".

/ravi

Let's put "civil" back in "civilization"
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ravib@ravib.com

Re: LNK2005

skaanji14-Oct-03 12:02

skaanji

14-Oct-03 12:02

jimNLX wrote:
These are local to their files

but linker puts these files together

Re: LNK2005

Jonas Larsson14-Oct-03 20:39

Jonas Larsson

14-Oct-03 20:39

Make them static to force internal linkage.

eg:

-- func.cpp --

static int x; // internal linkage, global to func.cpp only

-- func1.cpp --

static int x; // internal linkage, global to func1.cpp only

“Our solar system is Jupiter and a bunch of junk” - Charley Lineweaver 2002

dtmf decoding

Member 55624714-Oct-03 10:42

Member 556247

14-Oct-03 10:42

&Hi,
How can i decode dtmf signals from telephone line? TAPI doesn't meet my requirements, there're circuits that decodes dtmf signals but i want to implement it on PC with software.

Re: dtmf decoding

Michael P Butler14-Oct-03 22:50

Michael P Butler

14-Oct-03 22:50

TAPI is the easiest way of doing it in Windows. Is there a good reason for not using it. (Apart from poor TSPI support for your telephony device)

This old Slashdot article discussed Telephony and Linux there may be some useful links[^]

Michael

'Logic, my dear Zoe, merely enables one to be wrong with authority.' - The Doctor: The Wheel in Space

VC6 compilation problem in oleidl.h

Kuniva14-Oct-03 10:31

Kuniva

14-Oct-03 10:31

I recently reinstalled windows and Visual Studio 6. I almost forgot how fiddly it is to install all the SDK updates and all that. Now i finally managed to get it all i think but now when i try to compile any of my projects i get the following error:

c:\program files\microsoft visual studio\vc98\include\oleidl.h(5059) : fatal error C1021: invalid preprocessor command 'end'

Does anyone know how to fix this Frown | :(

Btw, the SDK update program installed the Windows 2003 server SDK and i'm running Windows 2000 professional (even though i don't think this has anything to do with it cause the include file is not in the updated SDK directory).

Kuniva
--------------------------------------------

Re: VC6 compilation problem in oleidl.h

Chris Richardson14-Oct-03 11:10

Chris Richardson

14-Oct-03 11:10

You can probably just open up oleidl.h and replace #end with #endif, like maybe oleidl.h got corrupted somehow. Or if that solution worries you, just reinstall VC6 again.

Chris Richardson

JAXB for C++?

Ravi Bhavnani14-Oct-03 9:57

Ravi Bhavnani

14-Oct-03 9:57

Anyone know of a JAXB package that spits out C++? I'm looking for an alternative to manual development of C++ classes from an XML schema.

I've found one on SourceForge but it doesn't seem to be mature. I was wondering if anyone knew of an Apache or IBM/AlphaWorks C++ implementation.

Thanks!

/ravi

Let's put "civil" back in "civilization"
Home | Articles | Freeware | Music
ravib@ravib.com

[DDraw] Surface creating problem

furbyhater14-Oct-03 9:36

furbyhater

14-Oct-03 9:36

Hi, this is my first post on the forum, my name's Florian and I'm from Switzerland (where they make the cheese Wink | ;)

Right now I'm beginning DDraw with c++ (where I'm still quite a beginner too), and I have started writing a DDraw class, a wrapper of a sort, to facilitate casual operations. One of the member functions is a function wich takes a LPDIRECTDRAWSURFACE7 as a parameter and should create a offscreen surface & point to it with the given LPDIRECTDRAWSURFACE7. But somehow it doesn't work, because when I check the pointer after having used the function, he's always invalid.
Here's the code:

<br />
// bool bKey checks for color-keying, iMemFlags controls memory<br />
// allocation (system/video memory)<br />
<br />
ENUM_RESULT CDDraw::CreateOffscreen(int iWidth, int iHeight, bool bKey, LPDIRECTDRAWSURFACE7 lpSurface, int iMemFlags)<br />
{<br />
	// clear ddsd and set size<br />
	memset(&itsDdsd,0,sizeof(itsDdsd) );<br />
	itsDdsd.dwSize = sizeof(itsDdsd);<br />
<br />
	// color-keyed surface or not<br />
	if(!bKey)<br />
		itsDdsd.dwFlags =  DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT;<br />
<br />
	else<br />
	{<br />
		itsDdsd.dwFlags =  DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT | DDSD_CKSRCBLT;<br />
<br />
		// set the defined color key<br />
		itsDdsd.ddckCKSrcBlt.dwColorSpaceLowValue  = itsTransColor;<br />
		itsDdsd.ddckCKSrcBlt.dwColorSpaceHighValue = itsTransColor;<br />
	}<br />
<br />
	itsDdsd.dwWidth		= iWidth;<br />
	itsDdsd.dwHeight	= iHeight;<br />
<br />
	itsDdsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN | iMemFlags;<br />
<br />
	// destroy previous surface, if valid<br />
	if(lpSurface)<br />
	{<br />
		lpSurface->Release();<br />
		lpSurface = NULL;<br />
	}<br />
<br />
        // itsLpDD points to a valid DD object<br />
	if(FAILED(itsLpDD->CreateSurface(&itsDdsd, &lpSurface, NULL) ) )<br />
	{<br />
		// error<br />
		return(VID_ERR_CREATEOFFSCREEN);<br />
	}<br />
<br />
	return(OK);<br />
}<br />

All the "its*" variables are class variables (of CDDraw), and I try to create the offscreen surface in another class, CMain, wich contains an instance of CDDraw ("itsVideo"), and a LP to a DD surface, "itsSprite". What I try to do looks like this:

<br />
// Set the color key<br />
  itsVideo.SetColorKey(255,0,255);<br />
<br />
  // Create the sprite surface<br />
  if ( (itsResult = itsVideo.CreateOffscreen( <br />
                             64,64,true,itsLpSprite) ) != OK)<br />
  { <br />
	// error<br />
    itsError.ShowMessage(itsWin.GetHwnd(), itsResult);<br />
  }<br />
<br />
  // check if valid surface has been created<br />
  if(!itsLpSprite)<br />
  { <br />
	// error<br />
    itsError.ShowMessage(itsWin.GetHwnd(), itsResult);<br />
  }<br />

And each time, I get an invalid surface...
Any advice/criticism (I'm sure there's alot to critic Wink | ;)

is welcome...

convert string to double without losing precision

godzooky14-Oct-03 9:18

godzooky

14-Oct-03 9:18

i'm trying to convert a string to a double without losing precision. for example, let's say you a string "0.070" and i want it to convert to double. so, i pass it into atof() and i get a double with a value of 0.069999999. how can i get the double to be 0.070? i tried to round the result of atof() to the number of decimal places, but that didn't help. anyone have any ideas?

thanks.

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