Re: why Function Name in DLL so strange ? - C / C++ / MFC Discussion Boards

jinzhecheng22-Dec-05 6:25

22-Dec-05 6:25

I got a DLL, in its function declare their is a function:
EXPORT int func1();

But when I display it in Dependency Walker, the actual name is something
like:
_func1@0

This DLL is compiled in visual c++ 6.0, I am wondering if
there is an option cause this problem.
Thanks

Re: why Function Name in DLL so strange ?

David Crow22-Dec-05 6:45

David Crow

22-Dec-05 6:45

jinzhecheng wrote:
...I am wondering if
there is an option cause this problem.

What problem? C functions are decorated with a leading underscore. Check whether you are using __cdecl or __stdcall.

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Re: why Function Name in DLL so strange ?

toxcct22-Dec-05 6:58

toxcct

22-Dec-05 6:58

did you ever look a what the compiler generates ?
this is called decorated names, exactly such as your func1()...

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Re: why Function Name in DLL so strange ?

vikas amin22-Dec-05 20:39

vikas amin

22-Dec-05 20:39

this is called decorated names, exactly such as your func1()...

I hope u mean Name Mangling by saying decorated names,

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Re: why Function Name in DLL so strange ?

Eytukan22-Dec-05 23:05

Eytukan

22-Dec-05 23:05

"decorated names" are more commonly used.

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Re: why Function Name in DLL so strange ?

C^hris L^osinger22-Dec-05 7:07

C^hris L^osinger

22-Dec-05 7:07

if you want undecorated names, you'll need to use a .DEF file

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Re: why Function Name in DLL so strange ?

jinzhecheng22-Dec-05 8:16

jinzhecheng

22-Dec-05 8:16

Thanks , I have created a def file, and its gone!

Re: why Function Name in DLL so strange ?

Bob Stanneveld22-Dec-05 20:15

Bob Stanneveld

22-Dec-05 20:15

Hello,

This is what the C++ compiler does to your function names. The process is called name mangling[^]. You can use extern C to say to the compiler that you only wish to add an underscore to the function name. This disables any overloading..

extern "C"
{
    void func1();
    // more functions here
}

Hope this helps. Smile | :)

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All of my .exe's crash >( why?

eos4life22-Dec-05 6:12

eos4life

22-Dec-05 6:12

I just installed VS 6.0 so I can learn C++ application programming. I'm using XP sp2 and everythign was working perfectly fine, but now after building any program [including those that worked fine before] when I run the debug executable it will promptly terminate and I get the following messages...

Loaded 'ntdll.dll', no matching symbolic information found.
Loaded 'C:\WINXP\system32\kernel32.dll', no matching symbolic information found.
The thread 0xCD4 has exited with code 4425000 (0x438528).
The program 'G:\Program Files\Microsoft Visual Studio\MyProjects\eosfirst03\Debug\eosfirst03.exe' has exited with code 4425000 (0x438528).

I've downloaded the win XP symbols and placed in the symbols folder of my windows install [c:\winxp] but to no avail. Debug .exe's that were compiled before I had this problem will still run fine. This happens even with a simple program like...

#include <iostream>
using namespace std;

int main()
{
cout << "blarg wtf";
}

the program runs and then terminates with the messages above. Whereas before it would run, and the window would remain open until I hit a key, now it just terminates. What gives, i'm lost =(

Re: All of my .exe's crash &gt;( why?

Nish Nishant22-Dec-05 8:33

Nish Nishant

22-Dec-05 8:33

Perhaps your machine has a virus?

Re: All of my .exe's crash &amp;amp;gt;( why?

PJ Arends22-Dec-05 8:57

PJ Arends

22-Dec-05 8:57

Nishant Sivakumar wrote:
Perhaps your machine has a virus?

No, his machine does not have a virus. What is happening is standard behaviour. The program's he is writing are console based programs, and the console window is closing immediately after his program exits. If he wants to execute the program and see the output he should either use the "execute without debugging" command (~~shift~~control-F5 or the exclaimation point icon) or he should execute the app from an open command prompt window.

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Re: All of my .exe's crash &amp;amp;amp;gt;( why?

Nish Nishant22-Dec-05 9:23

Nish Nishant

22-Dec-05 9:23

Ah okay

I should have read his post fully! My bad!

Re: All of my .exe's crash &amp;amp;amp;gt;( why?

eos4life24-Dec-05 14:53

eos4life

24-Dec-05 14:53

originally though these programs were not quitting at completion, they would wait until I pressed a key. I have another project that is set up as win32 app and it's window terminates immediately after it opens [the window is up for no more than 1 frame], it's the contents of this tutorial http://www.andypike.com/tutorials/directx8/001.asp

I also still can't figure out how to get vs6 sp6 to use the XP symbols...

Re: All of my .exe's crash &gt;( why?

ThatsAlok22-Dec-05 18:59

ThatsAlok

22-Dec-05 18:59

eos4life wrote:
#include
using namespace std;

int main()
{
cout << "blarg wtf";
}

change it to

#include<iostream.h>

#include<conio.h>

void main()
{
cout<<" hello Alok";
	getch();
}

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cheers,
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VC Forum Q&A :- I/ IV

Re: All of my .exe's crash &gt;( why?

Office Lineman23-Dec-05 6:16

Office Lineman

23-Dec-05 6:16

Have you installed SP5 for VS6?

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Re: All of my .exe's crash &amp;gt;( why?

eos4life24-Dec-05 14:48

eos4life

24-Dec-05 14:48

i've installed sp6 actually

How to move from one field to another by ENTER KEY

mikobi22-Dec-05 4:37

mikobi

22-Dec-05 4:37

I want that when I press one ENTER KEY, to move to another field through my view.
Now I move by TAB KEY.

What to do ?

I learn my self

Re: How to move from one field to another by ENTER KEY

Owner drawn22-Dec-05 17:22

Owner drawn

22-Dec-05 17:22

Try a combination of GetNextDlgTabItem(.....)

and PreTranslateMessage(...)

Hope this works... Smile | :)

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Re: How to move from one field to another by ENTER KEY

mikobi22-Dec-05 19:23

mikobi

22-Dec-05 19:23

Would you like to be clear.

I am a beginner.

What to do exactly

I learn my self

Re: How to move from one field to another by ENTER KEY

Sheng Jiang 蒋晟22-Dec-05 21:04

Sheng Jiang 蒋晟

22-Dec-05 21:04

How can I make the ENTER key act like the TAB key on a dialog?

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Re: How to move from one field to another by ENTER KEY

Owner drawn22-Dec-05 21:18

Owner drawn

22-Dec-05 21:18

He wants to move from one control to another ie he wants to simulate the behavior of the Tab key.

-- modified at 3:18 Friday 23rd December, 2005

Re: How to move from one field to another by ENTER KEY

Owner drawn22-Dec-05 21:30

Owner drawn

22-Dec-05 21:30

//include this function in yourview.cpp file
BOOL CMsgTesterView::PreTranslateMessage(MSG* pMsg)
{
	if(pMsg->message == WM_KEYDOWN)
		if(pMsg->wParam == VK_RETURN)
			pMsg->wParam=VK_TAB;
	return CFormView::PreTranslateMessage(pMsg);
}

//in yourview.h file include this
BOOL CMsgTesterView::PreTranslateMessage(MSG* pMsg);

I have tested it with a formview.

Re: How to move from one field to another by ENTER KEY

mikobi22-Dec-05 21:49

mikobi

22-Dec-05 21:49

Thanks for your help.

I works very well
God bless you.

Jesus is really the LORD, I accept it in my heart

Re: How to move from one field to another by ENTER KEY

Owner drawn22-Dec-05 22:00

Owner drawn

22-Dec-05 22:00

You said the best thing buddy. Big Grin | :-D

VS.Net 2005 and STL

Steve Thresher22-Dec-05 3:55

Steve Thresher

22-Dec-05 3:55

The size of a deque has changed between VS.Net 2003 and VS.Net 2005, extra member variables are added to the iterator base class in the debug build. This means you are now forced to link applications built for debug with debug versions of libraries. With VS.Net 2003 this was not the case. If you declare a deque in the debug build app and pass it to a release build library you will potentially be accessing the wrong offset in the deque.

Has anybody else encountered this problem or have a solution?

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