Re: Displaying HTML/web content within C++ app (no MFC) - C / C++ / MFC Discussion Boards

"error LNK2001" on Release Build

murali197311-Apr-06 13:46

murali1973

11-Apr-06 13:46

Hello,

I have a simple application where I try to display a dialog with a timer. It builds fine in the debug mode but not in the release mode. This is the error I get:

MainFrm.obj : error LNK2001: unresolved external symbol "protected: long __thiscall CMainFrame::OnNotifyPowerOnTime(unsigned int,long)" (?OnNotifyPowerOnTime@CMainFrame@@IAEJIJ@Z)
Release/NotifyTimer.exe : fatal error LNK1120: 1 unresolved externals

Relevant Code:
////////////////////////////////////////////////
// CMainFrame

#define WM_NOTIFY_POWER_ON_TIME (WM_USER + 1)

IMPLEMENT_DYNCREATE(CMainFrame, CFrameWnd)

BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
//{{AFX_MSG_MAP(CMainFrame)
ON_WM_CREATE()
ON_MESSAGE(WM_NOTIFY_POWER_ON_TIME, OnNotifyPowerOnTime)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////
function definition
/////////////////////////////////
protected:
//{{AFX_MSG(CMainFrame)
afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
afx_msg LRESULT OnNotifyPowerOnTime(WPARAM,LPARAM);
//////////////////////////////////

//////////////////the function///////////

LRESULT CMainFrame::OnNotifyPowerOnTime(WPARAM, LPARAM lParam)
{
...
...
return (LRESULT) 0;

}

Any suggestions? Help??
Thankyou

Murali

-- modified at 19:54 Tuesday 11th April, 2006

Re: "error LNK2001" on Release Build

dabs11-Apr-06 14:10

dabs

11-Apr-06 14:10

Make sure that the OnNotifyPowerOnTime function implementation is not enclosed within a #ifdef DEBUG section (there is one around the Dump( ) and AssertValid( ) functions, it may have ended up inside that section).

Wenn ist das Nunstück git und Slotermeyer? Ja! Beierhund das oder die Flipperwaldt gersput!

Re: "error LNK2001" on Release Build

murali197312-Apr-06 5:51

murali1973

12-Apr-06 5:51

Hi dabs,

You were right. The function was enclosed within a #ifdef _DEBUG section. I moved the function outside the #ifdef _DEBUG and recompiled and everything is fine. Thanks for your help.

Murali

Re: "error LNK2001" on Release Build

Laxman Auti11-Apr-06 18:20

Laxman Auti

11-Apr-06 18:20

//////////////////the function///////////

LRESULT CMainFrame::OnNotifyPowerOnTime(WPARAM, LPARAM lParam)
{
    ...
    ...
    return (LRESULT) 0;

}

where is the parameter of the wparam or is it ok...

Knock out "T" from CAN'T
You 'CAN' if you think you 'CAN'
Cool | :cool:

Re: "error LNK2001" on Release Build

murali197312-Apr-06 5:56

murali1973

12-Apr-06 5:56

Hi,

Do not need the actual parameter for WPARAM. As long as the defn. matches the decl. My code compiles fine in both the release (after the fix, thanks to dabs) and debug mode.

Murali

Win 32 DLL using .NET

act_x11-Apr-06 13:16

act_x

11-Apr-06 13:16

Does it make sense to use the .NET framework to develop a Win32 DLL that will reuse a lot of code from another project that uses MFC classes . I am going to stick to coding language as C++

If so what kind of solution ( project / language) is preferred ?

Engineering is the effort !

Re: Win 32 DLL using .NET

Ștefan-Mihai MOGA11-Apr-06 20:29

Ștefan-Mihai MOGA

11-Apr-06 20:29

act_x wrote:
Does it make sense to use the .NET framework to develop a Win32 DLL that will reuse a lot of code from another project that uses MFC classes

The answer is NO, it doesn't make any sense to me.

act_x wrote:
I am going to stick to coding language as C++

Long live the Microsoft Visual C++ Smile | :)

good choise!

act_x wrote:
If so what kind of solution ( project / language) is preferred ?

I guest you known the answer to that question! Poke tongue | ;-P

Re: Displaying HTML/web content within C++ app (no MFC)

Stephen Hewitt11-Apr-06 15:49

Stephen Hewitt

11-Apr-06 15:49

Sounds like you need to host an instance of the WebBrowser control. It's an ActiveX control so you'll to use MFC or ATL unless you want to implement the hosting code yourself (you almost certainly don't).

Steve

Re: Displaying HTML/web content within C++ app (no MFC)

chasetoys11-Apr-06 17:07

chasetoys

11-Apr-06 17:07

Stephen Hewitt wrote:
It's an ActiveX control so you'll to use MFC or ATL unless you want to implement the hosting code yourself (you almost certainly don't).

Thanks for the tip... I'd like to know if you think I should use (MFC or ATL) as I'm trying to read .html files on disk and display them within a screensaver. What is the easiest way of accomplishing this goal? I have to use the method declaration that follows, and all I have to use is a handle to the screensaver window (hWnd):

LRESULT WINAPI ScreenSaverProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)

-- modified at 23:15 Tuesday 11th April, 2006

socket question

nahitan11-Apr-06 11:02

nahitan

11-Apr-06 11:02

I have to send some data as XML format to two different places right now I send all the data to one location through a socket and I need to create another socket to send some other data to second location as follow:

If (data1)
send to LOC1
else
send to LOC2

and this LOC1 connection should always be open
at this point I have the socket and connection to LOC2

Please help me to know how to make the second connection to LOC1 for the first connection to LOC2 the code uses CfgRemoteAddr=127.0.0.1 and some local port: local 1222 and remote 1223.
as follow:
if( hCfg->CfgApiSocket->CfgTCP )
.
.
..
if( !hSocket->sSend( hCfg->CfgApiSocket->CfgRemoteAddr, 0, ( LPSTR )XMLString, XMLSize ))
{
//Socket::sSend( LPSTR Address, INT PortId, LPSTR txBuff, INT txBuffSize )
tmpVar = 0;
memset( Buff, '\0', MAX_LOADSTRING );
tmpVar = hSocket->GetError(( LPSTR )Buff );
LogError( "WEAPIClass", "InSockProcess", "Error sSend Socket: %d, %s", tmpVar, Buff );
LinkStatus( IPC_LINK_DOWN, 0, NULL, 0 );
}
else
{

LogAppDiag( LOGGER_INBOUND_DIAG, XMLString, XMLSize, LOG_FORMAT_ASCII );
}

Thanks for any idea

Nahitan

Memory Leak using Bounds checker

act_x11-Apr-06 10:11

act_x

11-Apr-06 10:11

for pointer variables defined globally say CmemObject *pMem = NULL

For a class CMyClass

CMyClass::Init()
{
pMem = new CMemObject();

}

CMyClass :: ~CMyClass()
{
if(pMem)
{
delete pMem;
pMem = NULL ;
}

}

Still shows a leak where the new operator is called .
Is it safe to ignore this error as I am finally de allocating it ?

Re: Memory Leak using Bounds checker

S. Senthil Kumar11-Apr-06 10:29

S. Senthil Kumar

11-Apr-06 10:29

Are you sure the destructor for CMyClass is getting called AND pMem is not set to NULL somewhere else?

Regards
Senthil
_____________________________
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Re: Memory Leak using Bounds checker

act_x11-Apr-06 10:49

act_x

11-Apr-06 10:49

im confident about this

Engineering is the effort !

Re: Memory Leak using Bounds checker

Joe Woodbury11-Apr-06 11:40

Joe Woodbury

11-Apr-06 11:40

Also, in Init() you should not allocate if already done so or call delete pMem before calling new. You don't have to check for NULL since by definition, nothing will happen if it is NULL.

If the allocation should never be called twice, add: assert(pMem == NULL)

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

"LNK2001: unresolved external symbol" Error

capricious_00111-Apr-06 9:57

capricious_001

11-Apr-06 9:57

Hi guys,

I was having a bit of trouble compiling a program of mine and was hoping someone kind enough could help me out.

Im desiging a simple program that basically sends an email by using sockets. However it looks like I'm getting linker errors. Here is the compiler generated report.

--------------------Configuration: sendEmailWinsock - Win32 Debug--------------------
Compiling...
sendEmailWinsock.cpp
Linking...
sendEmailWinsock.obj : error LNK2001: unresolved external symbol __imp__recv@16
sendEmailWinsock.obj : error LNK2001: unresolved external symbol __imp__connect@12
sendEmailWinsock.obj : error LNK2001: unresolved external symbol __imp__inet_addr@4
sendEmailWinsock.obj : error LNK2001: unresolved external symbol __imp__gethostbyname@4
sendEmailWinsock.obj : error LNK2001: unresolved external symbol __imp__htons@4
sendEmailWinsock.obj : error LNK2001: unresolved external symbol __imp__socket@12
sendEmailWinsock.obj : error LNK2001: unresolved external symbol __imp__WSAStartup@8
sendEmailWinsock.obj : error LNK2001: unresolved external symbol __imp__send@16
sendEmailWinsock.obj : error LNK2001: unresolved external symbol __imp__WSACleanup@0
sendEmailWinsock.obj : error LNK2001: unresolved external symbol __imp__closesocket@4
Debug/sendEmailWinsock.exe : fatal error LNK1120: 10 unresolved externals
Error executing link.exe.

sendEmailWinsock.exe - 11 error(s), 0 warning(s)

The environment I'm on is:

Windows XP Home
VC++ 6.0

I'm using registry functions within my program as well so I'm confident it is only to do with the winsock functions. I've been looking all over google for a solution but just when I think im close I'm pretty far away.

I'm thinking it's to do with my compiler options but not to sure if thats whats causing the problem. Any help is appreciated!

Robbie

Re: "LNK2001: unresolved external symbol" Error

Joe Woodbury11-Apr-06 10:08

Joe Woodbury

11-Apr-06 10:08

Add Winsock.lib or Winsock2.lib to your link options. (Edit: Add under additional libraries.)

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

-- modified at 16:08 Tuesday 11th April, 2006

Re: "LNK2001: unresolved external symbol" Error

capricious_00111-Apr-06 10:16

capricious_001

11-Apr-06 10:16

Hey Joe,

Thanks for your help that worked! Winsock.lib wasn't in my libraries but WSOCK32.lib was so I added that and it fixed the problem. Just an addition on my behalf in case anyone else has this problem in the future Wink | ;)

.

Thanks for the help once again Smile | :)

Robbie

To Jochen Kalmbach, Reg Stack Walker

psbasha11-Apr-06 7:54

psbasha

11-Apr-06 7:54

Hi Jochen Kalmbach,

This is regarding the stackwalker sample code available in http://blog.kalmbachnet.de/files/04-10-01__leakfinder.htm.When I used this sample code in my application and try to build and execute it is working.When we copied the application "Exe" into other machine,we are not able to generate the same stack report.It is throwing the following error.

1: SymGetLineFromAddr(): GetLastError = 126.

Could you please help us in fixing this error.If possible can you post your mail id here

Thanks in Advance
PSB
p_shakil@yahoo.com

Re: To Jochen Kalmbach, Reg Stack Walker

David Crow11-Apr-06 8:18

David Crow

11-Apr-06 8:18

psbasha wrote:
When we copied the application "Exe" into other machine...

What OS is it running?

psbasha wrote:
1: SymGetLineFromAddr(): GetLastError = 126.

Which resolves to "The specified module could not be found."

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: To Jochen Kalmbach, Reg Stack Walker

psbasha11-Apr-06 8:45

psbasha

11-Apr-06 8:45

It is Windows XP OS.

Re: To Jochen Kalmbach, Reg Stack Walker

David Crow11-Apr-06 8:48

David Crow

11-Apr-06 8:48

Does that machine have DbgHelp.dll v5.0 or later?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: To Jochen Kalmbach, Reg Stack Walker

psbasha11-Apr-06 9:13

psbasha

11-Apr-06 9:13

It has DbgHelp.dll V7.0.

Re: To Jochen Kalmbach, Reg Stack Walker

ThatsAlok11-Apr-06 8:48

ThatsAlok

11-Apr-06 8:48

psbasha wrote:
Hi Jochen Kalmbach,

You calling Mr Kalmbach from this forum.. why don't you post your query on his Blog.. or generally mr Kalmbach could be found in microsoft.public.vc.mfc newsgroup

Re: To Jochen Kalmbach, Reg Stack Walker

psbasha11-Apr-06 9:15

psbasha

11-Apr-06 9:15

Hi ,

Help me in posting the query in microsoft.public.vc.mfc

Thanks

Re: To Jochen Kalmbach, Reg Stack Walker

David Crow11-Apr-06 10:31

David Crow

11-Apr-06 10:31

See here.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

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