Re: Link Error - C / C++ / MFC Discussion Boards

satcat24-Mar-04 6:27

24-Mar-04 6:27

Hi all!

I'm trying to build a Visual C++ application (a dialog application in Release mode with a simple window that creates a new thread in CWindowDlg). It compiles but in link I get this error:

<br />
LINK : fatal error LNK1561: entry point must be defined<br />
NMAKE : fatal error U1077: 'link.exe' : return code '0x619'<br />

Does anybody know what it means and how I could eliminate it?

Thank you in advance!

Re: Link Error

Navin24-Mar-04 6:35

Navin

24-Mar-04 6:35

IT sounds like you either don't have a CWinApp class defined (e.g., somewhere you need the line: CMyWinAppDerievdClass theApp;)

Or your your project settings are incorrect and you aren't set to run an MFC project or something.

Remember, even if you win the rat race, you're still a rat.

Re: Link Error

satcat24-Mar-04 7:21

satcat

24-Mar-04 7:21

Well, I have in my code the line
CWindowApp theApp;
and I have "Use MFC in a shared DLL" so I don't know but I think they are not the problem...
Usually, I can compile and link with no problem, but when I try to create threads then I got this problems in link.
Any idea? D'Oh! | :doh:

Thanks!

Re: Link Error

David Crow24-Mar-04 7:11

David Crow

24-Mar-04 7:11

Are you using the /ENTRY option with the linker?

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: Link Error

satcat24-Mar-04 7:46

satcat

24-Mar-04 7:46

Where should I write down this option, please?

Thank you.

Re: Link Error

David Crow24-Mar-04 7:49

David Crow

24-Mar-04 7:49

In the .mak file. I assume you have one since nmake was mentioned.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: Link Error

satcat24-Mar-04 9:12

satcat

24-Mar-04 9:12

My make file is:

<br />
todo:   cliente.exe servidor.exe servidorV.exe<br />
<br />
cliente.exe:    cliente.obj imevoc.obj<br />
        link.exe cliente.obj imevoc.obj TAO_Portableserver.lib TAO_RTEvent.lib TAO_CosNaming.lib TAO.lib ace.lib  /libpath:"C:\corba\ACE_wrappers\LIB"<br />
<br />
servidor.exe:   servidor.obj imevoc.obj imevos.obj imevo_i.obj imevo.obj<br />
        link.exe servidor.obj imevo.obj imevoc.obj imevos.obj imevo_i.obj TAO_Portableserver.lib TAO_RTEvent.lib TAO_CosNaming.lib TAO.lib ace.lib  /libpath:"C:\corba\ACE_wrappers\LIB"  /NODEFAULTLIB:nafxcw.lib  <br />
<br />
servidorV.exe:  ventana.obj ventanaDlg.obj imevoc.obj imevos.obj imevo_i.obj imevo.obj<br />
        link.exe ventana.obj ventanaDlg.obj imevo.obj imevoc.obj imevos.obj imevo_i.obj TAO_Portableserver.lib TAO_RTEvent.lib TAO_CosNaming.lib TAO.lib ace.lib  /libpath:"C:\corba\ACE_wrappers\LIB" /ENTRY:"WinMain"<br />
<br />
cliente.obj:    cliente.cpp imevoc.h <br />
        CL cliente.CPP /MD /W3 /GX /O2 /I "C:\corba\ACE_wrappers" /I "C:\corba\ACE_wrappers\TAO" /I "C:\corba\ACE_wrappers\TAO\orbsvcs" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /FD /c<br />
<br />
imevoc.obj: imevoc.cpp imevoc.h<br />
        CL imevoC.CPP /MD /W3 /GX /O2 /I "C:\corba\ACE_wrappers" /I "C:\corba\ACE_wrappers\TAO" /I "C:\corba\ACE_wrappers\TAO\orbsvcs" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /FD /c<br />
<br />
imevos.obj: imevos.cpp imevos.h<br />
        CL imevos.CPP /MD /W3 /GX /O2 /I "C:\corba\ACE_wrappers" /I "C:\corba\ACE_wrappers\TAO" /I "C:\corba\ACE_wrappers\TAO\orbsvcs" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /FD /c<br />
<br />
servidor.obj:   servidor.cpp imevo_i.h <br />
        CL servidor.CPP /MD /W3 /GX /O2 /I "C:\corba\ACE_wrappers" /I "C:\corba\ACE_wrappers\TAO" /I "C:\corba\ACE_wrappers\TAO\orbsvcs" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /FD /c<br />
<br />
imevo_i.obj:  imevo_i.h imevo_i.cpp imevoS.h imevo.h imevo.cpp<br />
        CL imevo_i.CPP /MD /W3 /GX /O2 /I "C:\corba\ACE_wrappers" /I "C:\corba\ACE_wrappers\TAO" /I "C:\corba\ACE_wrappers\TAO\orbsvcs" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /FD /c<br />
<br />
imevo.obj: imevo.h imevo.cpp<br />
	CL imevo.CPP /MD /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /FD /c<br />
<br />
ventana.obj: ventana.h ventana.cpp<br />
        CL ventana.CPP /MD /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS"  /D "_AFXDLL" /D "_MBCS" /FD /c<br />
<br />
ventanaDlg.obj: ventanaDlg.h ventanaDlg.cpp<br />
        CL ventanaDlg.CPP /MD /W3 /GX /O2 /I "C:\corba\ACE_wrappers" /I "C:\corba\ACE_wrappers\TAO" /I "C:\corba\ACE_wrappers\TAO\orbsvcs" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_AFXDLL" /D "_MBCS" /FD /c<br />

cliente and servidor are console applications. First I made these console applications because I needed to work with CORBA and I thought that it was the easiest way, but they didn't work quite well so I tried to build the same application with MFC (creating a new thread in the main window that actues as the servidor (server)) but I get that link error.
Here in the make file, servidorV is the equivalent MFC application as servidor (at least I think so).

Thank you for your help.

Re: Link Error

David Crow24-Mar-04 9:21

David Crow

24-Mar-04 9:21

It looks like only 1 of the three "link" lines have the /ENTRY option.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: Link Error

satcat24-Mar-04 9:51

satcat

24-Mar-04 9:51

ok, I understand...
My problem now is that I don't know which is the main procedure in the application... I'm working in Visual C++ and my app is called Window (I only wrote /ENTRY:WinMain so I could know if I had understood you).

Thank you.

Re: Link Error

David Crow24-Mar-04 10:10

David Crow

24-Mar-04 10:10

Try changing the .mak file to the following in hopes of narrowing down which of the three modules is causing the problem:

todo: cliente.exe<br />
 <br />
cliente.exe: cliente.obj imevoc.obj<br />
link.exe cliente.obj imevoc.obj TAO_Portableserver.lib TAO_RTEvent.lib TAO_CosNaming.lib TAO.lib ace.lib /libpath:"C:\corba\ACE_wrappers\LIB"<br />
 <br />
cliente.obj: cliente.cpp imevoc.h <br />
CL cliente.CPP /MD /W3 /GX /O2 /I "C:\corba\ACE_wrappers" /I "C:\corba\ACE_wrappers\TAO" /I "C:\corba\ACE_wrappers\TAO\orbsvcs" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /FD /c<br />
 <br />
imevoc.obj: imevoc.cpp imevoc.h<br />
CL imevoC.CPP /MD /W3 /GX /O2 /I "C:\corba\ACE_wrappers" /I "C:\corba\ACE_wrappers\TAO" /I "C:\corba\ACE_wrappers\TAO\orbsvcs" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /FD /c

If this works, do the same for servidor.exe, and then servidorv.exe.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: Link Error

satcat24-Mar-04 12:00

satcat

24-Mar-04 12:00

I get the error building servidorv.exe
The makefile is:

<br />
todo: servidorV.exe<br />
<br />
servidorV.exe:  ventana.obj ventanaDlg.obj imevoc.obj imevos.obj imevo_i.obj imevo.obj<br />
        link.exe ventana.obj ventanaDlg.obj imevo.obj imevoc.obj imevos.obj imevo_i.obj TAO_Portableserver.lib TAO_RTEvent.lib TAO_CosNaming.lib TAO.lib ace.lib  /libpath:"d:\ACE_wrappers\LIB"<br />
<br />
ventana.obj: ventana.h ventana.cpp<br />
        CL ventana.CPP /MD /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS"  /D "_AFXDLL" /D "_MBCS" /FD /c<br />
<br />
ventanaDlg.obj: ventanaDlg.h ventanaDlg.cpp<br />
        CL ventanaDlg.CPP /MD /W3 /GX /O2 /I "d:\ACE_wrappers" /I "d:\ACE_wrappers\TAO" /I "d:\ACE_wrappers\TAO\orbsvcs" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_AFXDLL" /D "_MBCS" /FD /c<br />
<br />
imevos.obj: imevos.cpp imevos.h<br />
        CL imevos.CPP /MD /W3 /GX /O2 /I "d:\ACE_wrappers" /I "d:\ACE_wrappers\TAO" /I "d:\ACE_wrappers\TAO\orbsvcs" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /FD /c<br />
<br />
imevoc.obj: imevoc.cpp imevoc.h<br />
	CL imevoC.CPP /MD /W3 /GX /O2 /I "d:\ACE_wrappers" /I "d:\ACE_wrappers\TAO" /I "d:\ACE_wrappers\TAO\orbsvcs" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /FD /c<br />
<br />
imevo_i.obj:  imevo_i.h imevo_i.cpp imevoS.h imevo.h imevo.cpp<br />
        CL imevo_i.CPP /MD /W3 /GX /O2 /I "d:\ACE_wrappers" /I "d:\ACE_wrappers\TAO" /I "d:\ACE_wrappers\TAO\orbsvcs" /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /FD /c<br />
<br />
imevo.obj: imevo.h imevo.cpp<br />
	CL imevo.CPP /MD /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /FD /c<br />
<code><br />
And the nmake throws:<br />
<code><br />
LINK : fatal error LNK1561: entry point must be defined<br />
NMAKE : fatal error U1077: 'link.exe' : return code '0x619'<br />
Stop.<br />

when it ends compiling.
servidor and cliente are OK.
Which could be the problem?

Thanks!

Re: Link Error

David Crow25-Mar-04 2:17

David Crow

25-Mar-04 2:17

Do any of the following modules contain a WinMain(), or equivalent, function:

ventana.cpp
ventanaDlg.cpp
imevoc.cpp
imevos.cpp
imevo_i.cpp
imevo.cpp

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: Link Error

satcat25-Mar-04 2:42

satcat

25-Mar-04 2:42

I think so since I've created the ventana.dsw project and in other projects I had no problems, but I don't really know which is the function that begins here D'Oh! | :doh:

When I build my project in Visual C++ instead of DOS console with nmake, I get this different message error:

<br />
ventanaDlg.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall CVentanaDlg::OnOK(void)" (?OnOK@CVentanaDlg@@MAEXXZ)<br />
Release/ventana.exe : fatal error LNK1120: 1 unresolved externals<br />

The error that I get in the DOS console is about the entry point as I told you... I can't see the relationship between these errors.

Waiting for your help and knowledge Smile | :)

Thanks!

Re: Link Error

David Crow25-Mar-04 3:01

David Crow

25-Mar-04 3:01

Why don't you open the ventana.dsw workspace, click on Project/Export Makefile. Compare this .mak file with the one you are currently using. Notice that it probably contains a lot more .cpp files.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

controlling a webcam

PotatisPulver24-Mar-04 6:04

PotatisPulver

24-Mar-04 6:04

Hello,

I need to control a webcam and analyze picture by picture (and pixel by pixel) but I do not really know where to to start. Do you have to have the manufacturers API or is there any windows standard interface that you may use? Can you use VC++ or VB classes? Do you poll frame by frame or do you get a continuous stream? What format would you expect to get on the pics/stream, complete pics or changes? etc etc.

Thanks for any help I may get.

kodvar

compile from command line

skoizumi2911024-Mar-04 5:56

skoizumi29110

24-Mar-04 5:56

I am trying to compile my application from command line
but somehow i can't do it here is the input for compiling my application with
registry tool and i want to use the different .exe file for this application
cl RegistryTools.cpp MyApplication.cpp -Fe MyApplication2.exe

thanks
Shin

Re: compile from command line

Steve S24-Mar-04 6:26

Steve S

24-Mar-04 6:26

There are lots of options that are set in project settings, things like INCLUDE paths, DEFINE-d symbols, and the like.

You say it doesn't do it, but you aren't giving any clues as to what errors you see.

Steve S

Re: compile from command line

skoizumi2911024-Mar-04 6:35

skoizumi29110

24-Mar-04 6:35

now i am one step forward and only problem is the following
cl RegistryTools.cpp MyApplication.cpp -FeMyApplication2.exe

> nafxcw.lib(thrdcore.obj) : error LNK2001: unresolved external symbol
> __endthreadex
> nafxcw.lib(thrdcore.obj) : error LNK2001: unresolved external symbol
> __beginthreadex

Re: compile from command line

John M. Drescher24-Mar-04 6:49

John M. Drescher

24-Mar-04 6:49

http://www.codeproject.com/cpp/cppforumfaq.asp?target=FAQ#cl_linkerrthread[^]

John

Re: compile from command line

vancouver77726-Mar-04 11:09

vancouver777

26-Mar-04 11:09

thanks,
i decided to use namke instead of cl.exe

thanks for your input.

Shinya

Listening to Keyboard Input

0v3rloader24-Mar-04 5:29

0v3rloader

24-Mar-04 5:29

Hello,

I was wondering if anyone here knows how to listen to keyboard input in Windows platform by means of using MFC.

To be more exact, whenever this specific application of mine is running, CTRL + DEL (among other keyb combinations) cannot reach the OS and must be filtered by the App, which will prevent the user from invoking Task Manager / Logging Off / Shutding Down (though there is always Reset/Power Off), etc.

Any idea would be much appreciated.

________________________

dNimrod#X

Re: Listening to Keyboard Input

Dudi Avramov24-Mar-04 5:48

Dudi Avramov

24-Mar-04 5:48

Read about hooking starting from SetWindowsHookEx using WH_KEYBOARD_LL hook type.
You can hook ALT+CTRL+DEL by i think that the OS won't let yu block it. The dialog will be opened anyway.
However,you can disable the buttons of the opened window by setting some values in the registry Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer.
Read Disable Windows NT alt-ctrl-del dialog button

Re: Listening to Keyboard Input

0v3rloader24-Mar-04 7:39

0v3rloader

24-Mar-04 7:39

Dudi Avramov wrote:
However,you can disable the buttons of the opened window by setting some values in the registry Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer.
Thanks a lot for the reply. I have heard certain OSes do not allow you to have full control over the CTRL+ALT+DEL feature.

However, what's so important about the app ?
Well I have an app which needs to be invulnerable to the more naive (or ignorant, should I say) users because some extremelly important analysis & update process has to be carried out and whilst it is being done, no keyboard input should be allowed.

Does anyone have any ideas as to what I should do?

Thanks very much for the replies. Big Grin | :-D

dNimrod#X
________________________

Re: Listening to Keyboard Input

Steve S24-Mar-04 6:34

Steve S

24-Mar-04 6:34

If it's NT, 2K or 2.03K, you can't do it that way, the SAS will always be picked up, for obvious security reasons. If it's Win9x/ME then it is simpler.
However, what's so important about the app ? Smile | :)

Steve S

'class' type redefinition error

Mughi24-Mar-04 5:13

Mughi

24-Mar-04 5:13

I got this error in my program
error C2011: 'CRichText' : 'class' type redefinition.

I added a RichText ActiveX Control and added a variable for it.
Once when i compiled, I got stuck with the above error.
Iam unable to proceed further.
Please help me out.
I thank in advance.

Mughi

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