C / C++ / MFC Discussion Boards

ThatsAlok30-Dec-04 18:08

30-Dec-04 18:08

if you talking about old Turbo C , I am very sorry there is no support for multithreading in Dos based application.

but you can simulate that by using GetVert() and SetVert() function,see detail for them in your local turbo C documentation.

"I Think this Will Help"
Alok Gupta
visit me at http://www.thisisalok.tk

Using Vectors

dlarkin7730-Dec-04 9:29

dlarkin77

30-Dec-04 9:29

Hi,

Can anybody help me with the following?

I have a text file with some text. The text on each line is separated by a comma. The length of the text on each line varies. I have to store this information somehow.

I intended to create a 2D array but the size of an array has to be fixed, so that wouldn't accomodate the case where I am reading text from a large file.

It was suggested that I use a vector, but I have no idea how to work with them.

Can somebody help me out with how to create a vector that acts like a 2D array. Also how can I resize the vector? Where can I find an API that shows what methods can be used?

Hope this isn't asking too much.

Thanks very much,

dlarkin77 Confused | :confused:

Re: Using Vectors

ThatsAlok30-Dec-04 18:23

ThatsAlok

30-Dec-04 18:23

Hi Dlarkin!
there Is predefined VECTOR Class in STL under std namespace.

Search for Vector in you local copy of MSDN

or Here is Small tutorial to use that.

#include <vector>
#include <iostream.h>
std::vector<int> i;

void main()
{
//adding element
i.push_back(20);
i.push_back(30);
i.push_back(40);

//displaying element
std::vector<int>::iterator it;
for(int j=0,it=i.begin();it!=i.end();it++,j++)
cout<<j<" Element in vector is " <<*i<<endl;

}

"I Think this Will Help"
Alok Gupta
visit me at http://www.thisisalok.tk

Re: Using Vectors

Neville Franks31-Dec-04 10:06

Neville Franks

31-Dec-04 10:06

If just need to read the file and process its contents then I suggest having a look at memory mapped files. This will let you treat the file as one big string. Very fast to.

Neville Franks, Author of ED for Windows www.getsoft.com and Surfulater www.surfulater.com "Save what you Surf"

Problem with USB Audio mu-Law

Fei184087730-Dec-04 9:17

Fei1840877

30-Dec-04 9:17

Dear Sir,

Problem Description – Unable to capture audio from USB Audio Device when the format is set to MuLaw.

Scenario – We developed USB Audio Device that produces Audio in MuLaw Format. The USB descriptors are correctly set to indicate that the Audio format. Please see the attached file showing the descriptors.

Description – We want to capture Audio in MuLaw format. Windows DDK documentation states that it supports all “All Type I formats” (MuLaw being one of them). Refer to http://www.microsoft.com/whdc/device/audio/usbaud.mspx (document name - USB_Audio_and_Windows.doc). Also refer to the same information in Windows DDK documentation at mk:@MSITStore:C:\WINDDK\2600\help\stream.chm::/hh/ddkslm/stream/aud-design_8gmr.htm.

When we connect the Audio device Windows recognizes it properly as an Audio device and shows it in the Control Panel. When we check the Audio formats using both GraphEdit (DirectX 9.0) and Adobe Audition, it shows as “None”. As a result we are unable to capture Audio from the device.

Additional Info – When we change the USB Audio Device properties (by changing the descriptors) to PCM8 the device works without any problem.

Re: Problem with USB Audio mu-Law

namaskaaram2-Jan-05 17:22

namaskaaram

2-Jan-05 17:22

Dear Sir,

i am also working on USB(newbie here.....)
i have a doubt?

i want to use windows usb driver,but how do i direct the midi data to this??
i a have directed the midi data to the default windows sw synth,what r the commandz that r reqired to set this to the already existing windows midi usb driver???/

please help me out!!!!!

Confused | :confused:

The breakpoint will not currently be hit - Invalid file line! ???

clayman8730-Dec-04 9:16

clayman87

30-Dec-04 9:16

Ms VC++ .Net 2003 tells me this just out of nothing for (some) breakpoints, at some build, however it worked totally correct at the last build. Someone recommended me deleting build folder, done that, deleting project.suo, done that, debug and non-incremental RE-build, done, turning all optimalisation options OFF, done.

Then what the hell causes this stupid error or whatever?

ActiveX in a no-MFC application

MainMa30-Dec-04 8:58

MainMa

30-Dec-04 8:58

There is a lot of examples of using ActiveX components in MFC applications, but I didn't found any code which shows, how to use ActiveX in no-MFC apps.

I don't know MFC, but I often need to include ActiveX (like Web view) into my projects. Is there a way to do it, or I need to learn MFC?

How Create a Printer Port Monitor??

raf-sp30-Dec-04 7:32

raf-sp

30-Dec-04 7:32

Please,

How create a Printer Port Monitor??

I need to create this.

Please help me!!!

raf-sp

Re: How Create a Printer Port Monitor??

ThatsAlok30-Dec-04 21:59

ThatsAlok

30-Dec-04 21:59

This Faq Help you to programatically detect printer port.
How can I determine the status of the printer programmatically?

now rest you have to make loop which check printer at regular interval

"I Think this Will Help"
Alok Gupta
visit me at http://www.thisisalok.tk

Re: How Create a Printer Port Monitor??

raf-sp3-Jan-05 5:23

raf-sp

3-Jan-05 5:23

Thank´s but,

I don´t found this FAQ "How can I determine the status of the printer programmatically?" here.

"now rest you have to make loop which check printer at regular interval". Please, you have some example??

Thank you!!

problem in RIP

Chuan^230-Dec-04 6:26

Chuan^2

30-Dec-04 6:26

hey guys,im a degree student in networking,recently im doing my project about the packet analyzer,but i face a problem in retrieving the RIP (routing information protocol) header information, for example: command,version,etc. i had read through the RFC 1058 & RFC 2453,but i still dont have any idea, is there anyone can help? pls,10q so much.

p.s. i dont know how to use C++ to retrieve the information, is there any sample source code or advice?

Re: problem in RIP

moliate2-Jan-05 11:57

moliate

2-Jan-05 11:57

I don't have a direct answer for your question, but I think the reference on the topic is "TCP/IP Illustrated, Volume 1+2". Volume 2 holds a lot of implementation details of the NetBSD? kernel TCP/IP stack.

/moliate

The corners of my eyes catch hasty, bloodless motion -
a mouse?
Well, certainly a peripheral of some kind.

Neil Gaiman - Cold Colours

Connection with Oracle 9i through VC++

Qaisar Ch30-Dec-04 6:03

Qaisar Ch

30-Dec-04 6:03

I want to connect Oracle database through VC++ without using ODBC connection.
I got OCL library from http://crlab.com/ocl but its not working properly.
Can anybody provide me a sample code for this problem(Connection wiht Oracle 9i database through VC++ without ODBC connection).

Weird Class Wizard Problems.

JD Steffen30-Dec-04 5:51

JD Steffen

30-Dec-04 5:51

I am begging for help on this. I had a VC6 project that I converted to .NET 2003 and when I went to add a class using the add class wizard, it gave me the following error: "MFC classes can only be added to MFC projects." Thinking that it might of been a conversion problem, I rebuilt the project file using .NET 2003. It worked and I can add classes to the project. Now, the weird thing is if I move the directory that contains the project it goes back to giving me the previous error. I am really stumped on this one. Here is a link to a zip file that contains the "working" project. (It's full path on my drive is c:\Test\TinyCad). If someone could please take a look and tell me if your getting the same thing, or if you happen to know whats going on that would be of much help. Thank you for your time and attention.

http://www.angelfire.com/electronic2/testme/TinyCad.zip
The zip file is 15MB in size.

Some side notes:
I do not have a copy of VC6 otherwise I would have tried to see if the original dsw/dsp files are suffering from the same problem.
TinyCad is a schematic capture program written by Matt Pyne.

Memory layout for XP

Anonymous30-Dec-04 5:36

Anonymous

30-Dec-04 5:36

I can NOT find anywhere on the internet a complete memory layout of RAM for XP.

IOW, I want someone to have gotten a memory dump and gone through and explained/showed where everything is.

JL

Re: Memory layout for XP

David Crow30-Dec-04 8:32

David Crow

30-Dec-04 8:32

Anonymous wrote:
I want someone to have gotten a memory dump and gone through and explained/showed where everything is.

Everything like what? I'm not sure of what benefit this would be since a memory snapshot will likely differ each time Windows is started. Windows does not load a program in the same location each time. It is all governed by what might already be at that spot. Windows will try to load a program based on an address contained within the EXE/DLL itself, but if something is already loaded in that spot, Windows has to dynamically re-base the program to start at some other unoccupied location.

Having said all that, is there something specific that you are after? Maybe a better solution is possible if given a clearer description of the problem.

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

memory available on drive

grace_sonal30-Dec-04 5:17

grace_sonal

30-Dec-04 5:17

Hi!!
I would liek toknow id VC++ supports any inbuilt function call to read the amount of memory or disk free space????
This value to be displayed on the VC++ Front end being developed.
Grace Sonal

Re: memory available on drive

Michael Dunn30-Dec-04 5:59

Michael Dunn

30-Dec-04 5:59

C++ has no such functions built-in because that kind of info is inherently platform-specific. Check out the GlobalMemoryStatus() and GetDiskFreeSpaceEx() APIs.

--Mike--
LINKS~! Ericahist | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ | You Are Dumb
-----
Magnae clunes mihi placent, nec possum de hac re mentiri.

IMAPI Problem

Anorexic Tribble30-Dec-04 5:01

Anorexic Tribble

30-Dec-04 5:01

Has anyone used the Image Mastering API (IMAPI)?

I can't get the Get / Set volume name to work. Here is my code for Get Volume name

CString              Volume_Name;<br />
IPropertyStorage*    Properties;<br />
PROPSPEC             Property_Type[1];<br />
PROPVARIANT          Property_Value[1];<br />
BOOL                 Result;<br />
<br />
// Get all the Joliet properties<br />
               Result =  m_Joliet->GetJolietProperties(&Properties);<br />
               if (Result)<br />
               {<br />
                  Property_Type[0].ulKind = PRSPEC_LPWSTR;<br />
                  Property_Type[0].lpwstr = ::SysAllocString(L"VolumeName"); <br />
                  m_Result_Code = Properties->ReadMultiple(1, Property_Type, Property_Value);<br />
                  Result = SUCCEEDED(m_Result_Code);<br />
                  Volume_Name = (CString)Property_Value[0].bstrVal;<br />
               }

Everything works. The result code is success, but the volume name is always an empty string.

Similarly the set volume name function succeeds, but the volume name of the CD burned is blank.

watch video

Naveen30-Dec-04 4:40

Naveen

30-Dec-04 4:40

i have got two problems while working with a project.Somebody please help.

1) i want to display the continues screen image of the computer in my apllication.The continues screen image should should even include the mouse move.
2) i want to transfer this screen shots to another computer without any i/o operations such as saving to hardisk,So that he could monitor what's happening in the other computer.I am using the "CSocket" class for networking.

nav

Fuzzy set and c++ !

faroqtam30-Dec-04 4:39

faroqtam

30-Dec-04 4:39

Hi

I have work with fuzzy set project and i need some help for
how i can create inferance for fuzzy set
theroy in the c++ code .

plz any type of help about Fuzzy set can help me .

On Earth nothing impossible,
while your mind running.

Faroqtam

A Question about CDockBar

prabbit201030-Dec-04 4:21

prabbit2010

30-Dec-04 4:21

Hi,
I have a class CFixedDockBar derived from CDockBar, since I want to do some tiny changes to the algorithm of Layout. After that, I override the EnableDocking method since I want to use my new DockBar, in that method, I just substitue CDockBar with CFixedDockBar. Problems occur when i build the project, it says some linking error,
cannot resolve external symbol static unsigned long const (* CFrameWnd::dwDockBarMap)[2]" (?dwDockBarMap@CFrameWnd@@1QAY01$$CBKA)

Why is this happening? Do i need some extra libs?

thanks everybody Smile | :)

Problem with printing in CRichEditView

Stojan7830-Dec-04 4:02

Stojan78

30-Dec-04 4:02

Hi
I have a problem with printing in a CRichEditView. I have a program that uses a CScrollView and there everything works fine. Both programs uses the same printingcode.

I´m not printing directly from the screen, I´m printing from a CStringArray, but this works fine in my other program so that shouldn´t be the problem.

For each side I´m printing the indent increases. This does not happen in printPreview mode. I can´t figure it out. Is there someone who recognices this problem.

I think I discovered where the problem lies. In my OnPrint when i call on CDC::LPtoDP(CRect), the CRect:s leftvalue doubles up in every call on OnPrint. Just before the call, the CRect:s left value is the same in all calls on OnPrint.

Thanx everybody

//Henrik

Web Services

Rassul Yunussov30-Dec-04 1:14

Rassul Yunussov

30-Dec-04 1:14

I would like to build three tier DB architecture using Web Services, and looking for convinient way to pass recordsets... So, how to transfer database data? Using SafeArray? Or i can use something else?

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