Face Recognition - C / C++ / MFC Discussion Boards

David Crow8-Sep-04 5:55

8-Sep-04 5:55

Anonymous wrote:
libcmtd.lib(crt0.obj) : error LNK2001: unresolved external symbol _main

Lots of possible causes.

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

Named Pipe Closing Problem

Ceri7-Sep-04 23:47

Ceri

7-Sep-04 23:47

Hi,

I have a program which creates a named pipe in one thread and then launches another to call ConnectNamedPipe.

Now at some point in the initial thread it will be required to shutdown, so I have tried calling DisconnectNamedPipe followed by CloseHandle but this does not seem to free up the thread that is listening on ConnectNamedPipe and it remains blocking.

Anybody know of a solution to this

Cannot access the ClassView information file

Cedric Moonen7-Sep-04 22:48

Cedric Moonen

7-Sep-04 22:48

Hello !

I was working on my project and I did something work (don't know what exactly Confused | :confused:

...). Visual C++ threw an exception and the program was exited. Now, when I load my project again, I have always this error message: "Cannot access the ClassView information file. ClassView information will not be available."
How can I solve the problem ???

Thanks

Re: Cannot access the ClassView information file

RChin7-Sep-04 23:06

RChin

7-Sep-04 23:06

This is a common problem in VS6. Quit VS and then delete the byproduct files (*.plg, *.clw, *.ncb etc.) Restart VS then you should be fine. It will asked you to re-generate the classwizard database, but this only takes a few seconds.

[edit] ..also, make sure that all processes of VS are terminated. VS6 did have an irritating habit of seeminly crashing, but still showed up in the process list.[/edit]

I Dream of Absolute Zero

Re: Cannot access the ClassView information file

Cedric Moonen7-Sep-04 23:11

Cedric Moonen

7-Sep-04 23:11

Thanks for your response !
In fact I tried to rename the *.plg file and it said that the file was in use... So I took a look at the task manager (no Visual C++ was open) and I saw that the MSDEV process was still running... So I killed it and now that works fine (so, no need to delete the files Wink | ;-)

).
Thanks

Re: Cannot access the ClassView information file

RChin7-Sep-04 23:14

RChin

7-Sep-04 23:14

cedric moonen wrote:
d I saw that the MSDEV process was still running...

Yes. I modified my response when I thought that might also be an issue as well.

I Dream of Absolute Zero

Re: Cannot access the ClassView information file

David Crow8-Sep-04 5:57

David Crow

8-Sep-04 5:57

cedric moonen wrote:
...no Visual C++ was open) and I saw that the MSDEV process was still running...

They are one in the same.

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

Face Recognition

jerry0davis7-Sep-04 22:38

jerry0davis

7-Sep-04 22:38

I've been asked to look at the possibility of implementing face recogition from a web cam. I work for a small company so can't afford any extensions that you have to pay for. Does anyone know of any freeware face recognition libraries? Are there any special key words I could google for?

Thanks

I feel like I'm diagonally parked in a parallel universe

Jerry Davis
http://www.astad.org
http://www.jvf.co.uk

Re: Face Recognition

Jose Cezar S. Ynion7-Sep-04 23:51

Jose Cezar S. Ynion

7-Sep-04 23:51

Hi,

I had seen running projects for that one, but it is not really realible and robust.

What the programmer did :
1. Capture the image using the webcam
2. Search from the databank by comapring pixel by pixel. The matching percentage will be compared based on the tolerance defined level say +/- 90%

Of course the lightings and position of the head will sureley affect, even hairdo.

MFC and "windows xp style" controls

m_dale7-Sep-04 22:10

m_dale

7-Sep-04 22:10

I was wondering out of interest, why don't my MFC projects in VC++ .NET use windows xp styling on their controls?
The simplest way i can think to explain what I mean is:
On a windows xp machine using the windows xp style display, bring up the run dialog from the start menu. The command box has a thin border and looks flat, and the buttons are rounded and have highlighting etc.
Now switch to windows classic style display, and bring it up again. ALL my projects look like this.

Is that just how MFC is, or have i skipped a setting somewhere?

Thanks.

Re: MFC and "windows xp style" controls

Graham Bradshaw7-Sep-04 23:11

Graham Bradshaw

7-Sep-04 23:11

You need to include a manifest file with the application, either as a separate file, or embedded in the exe/dll as a resource. See http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwxp/html/xptheming.asp[^] for a starting point.

Re: MFC and "windows xp style" controls

m_dale8-Sep-04 1:06

m_dale

8-Sep-04 1:06

Thats what I don't understand, VC++ .NET does it by default, and it still isn't working.
Just to be sure, I included the lib (project->properties->linker->advanced->import library: comctl32.lib) and the header (#include commctrl.h).
The manifest is already in the source tree as MFC projects create one by default.
I have tried including the manifest as a file with the app, and embedding it, and i still get windows classic controls.

Any more ideas? :s

conio.h

xlilo_guy7-Sep-04 21:30

xlilo_guy

7-Sep-04 21:30

hi, this is the first post for me in here,, i am working with VC++ with some of Dev-C++... under VC++ there is a header called conio.h, there is a function called _out ,,, it is to output a byte to a port,,, i can find that function in conio.h's Dev-C++

Re: conio.h

jan larsen8-Sep-04 1:31

jan larsen

8-Sep-04 1:31

Your grammar is a bit obfuscated, but I guess that you're having problems writing to an IO port.
In Win32 you will have to use CreateFile() and WriteFile() when accessing the COM ports. Look up the functions in the help files, there is a description on how to open a port.

"After all it's just text at the end of the day. - Colin Davies

"For example, when a VB programmer comes to my house, they may say 'does your pool need cleaning, sir ?' " - Christian Graus

Re: conio.h

David Crow8-Sep-04 6:00

David Crow

8-Sep-04 6:00

I don't see a question here. What are you wanting help with? Please be specific so we don't wander aimlessly through the forest looking for each other!

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

SecurityCenter XP2 and CreateFile

hph7-Sep-04 20:54

hph

7-Sep-04 20:54

Hello everbody,

i have a very very idiocratical problem! currently i try to change my application so it then supports the SecurityCenter located in XP Service Pack 2. The communication to the SecurityCenter works without any problems, but only in the debug version. I need to use the funcion CreateFile to enumerate some stuff. And as mentioned this works only in the debug version. In the release version the CreateFile function namly works but the communication to the SecurityCenter is missing. If i ignore (cancel out) the CreateFile function the SecurityCenter recognizes my application again, even in the release version!

Has anyone an idea of what i'm doing wrong ?

Thanks in advance!

rror LNK2001: unresolved external symbol "public: int __thiscall CMyCrypto::Decrypt(unsigned char *,unsigned long *,int)

manikanth7-Sep-04 20:38

manikanth

7-Sep-04 20:38

in .cpp file
myCrypto.Decrypt(pBuffer, &dwBytes,myEOF(hFile1, dwFileSize))

.h file
Decrypt(LPBYTE pData, LPDWORD dwDataSize, int bFinal)

where is the error?

thank u all

Re: rror LNK2001: unresolved external symbol "public: int __thiscall CMyCrypto::Decrypt(unsigned char *,unsigned long *,int)

RChin7-Sep-04 23:13

RChin

7-Sep-04 23:13

The error seems to be that your method, ::Decrypt(), has not been defined.
It is declared in the header file as you have stated, but somehow the compiler cannot find the corresponding implementation of this function.

I Dream of Absolute Zero

Multi line text box and check box

anuchelvi7-Sep-04 20:00

anuchelvi

7-Sep-04 20:00

Hi,
The module is to send data in 1 text box and receive that data in another text box using 2 buttons.
But when a check box is checked, a single line data should be received in the second text box. How is it possible?
Pls anyone help imm.

mithila

How could i develop a running-once application

ginee7-Sep-04 19:54

ginee

7-Sep-04 19:54

Hi,
How can i develop a application which can execute once and the executive file would be removed from device. Like: After program show a message, this executive file is removed. I got a straight way that after the application executes, deleting this application file. But how? Running program couldn't delete itself. Any suggestion is welcome. Thanks!

Regards, ginee

Re: How could i develop a running-once application

Scozturk7-Sep-04 22:27

Scozturk

7-Sep-04 22:27

Hi,
One solution is to create a .bat file with deleting instructions. You will call the bat file at the end (before return). That work's generally.
I hope this helps...

Well... I am a beginner ...

Re: How could i develop a running-once application

ginee8-Sep-04 15:42

ginee

8-Sep-04 15:42

While that program is running (before return or some other interrupt, this program doesn't be terminated), i think the executive file is locked. And it can be deleted or moved. However, i will try this way. Thanks you!

Re: How could i develop a running-once application

Anonymous8-Sep-04 20:25

Anonymous

8-Sep-04 20:25

I think the reason why the .bat file method works is because you put it just before return and the program you want to delete exits faster than the bat file opens...

Re: How could i develop a running-once application

User 2155978-Sep-04 0:59

User 215597

8-Sep-04 0:59

I think i read some articles briefly on www.codeguru.com
Try Google for "self deleting executable"
(http://www.google.co.in/search?hl=en&ie=UTF-8&q=self+deleting+executable&meta=[^])

I sure you will get some.
Hope this helps

-------------------------
Have a great day ahead!
Regards,
Sohail Kadiwala

modified 21-Apr-21 21:01pm.

Re: How could i develop a running-once application

Arsalan Malik8-Sep-04 20:12

Arsalan Malik

8-Sep-04 20:12

Please check the following article: Eek! | :eek:

http://www.microsoft.com/msj/archive/SF9C.aspx

Arsalan Malik

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