C / C++ / MFC

3-Apr-07 5:03

Hi,

I have copied the winsocket program form the url::::http://www.codeproject.com/internet/winsockintro01.asp.

When I tried the build the copied code i am getting the following error

WinSock.cpp
D:\MAHA\DLG TEST\WinSock\WinSock.cpp(26) : error C2065: 'AfxBeginThread' : undeclared identifier
D:\MAHA\DLG TEST\WinSock\WinSock.cpp(108) : error C2065: 'sprintf' : undeclared identifier
Error executing cl.exe.

I have googled for this error, some one suggested to include the #include<afxwin.h> or #include<afx.h>..I tried for this and got the below error

D:\Program Files\Microsoft Visual Studio\VC98\MFC\INCLUDE\afxv_w32.h(14) : fatal error C1189: #error : WINDOWS.H already included. MFC apps must not #include <windows.h>
Error executing cl.exe.
Creating browse info file...
BSCMAKE: error BK1506 : cannot open file '.\Release\WinSock.sbr': No such file or directory

Can any one guide me how to aviod this error.

nandu

David Crow3-Apr-07 5:55

David Crow

3-Apr-07 5:55

Including afxwin.h in your project's stdafx.h file should suffice.

Are you sure you really need to use sprintf() (with MFC)? There are (better) alternatives.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Nandu_77b4-Apr-07 0:04

4-Apr-07 0:04

Hi DavidCrow,

Here the proble is "error C2065: 'AfxBeginThread'" and as of now i m not worried with sprint.f

As I said in the above mail theread, I took the code in the above specified url path. When i tried to comipl the code i got the error "error C2065: 'AfxBeginThread'".....and I dont know why i am getting this error.

Thanks
Nandu

David Crow4-Apr-07 2:44

David Crow

4-Apr-07 2:44

Nandu_77b wrote:
When i tried to comipl the code i got the error "error C2065: 'AfxBeginThread'".....and I dont know why i am getting this error.

Did you do the six bullet points near the top of the article?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Nandu_77b4-Apr-07 2:51

4-Apr-07 2:51

ya i ensured that i followed that six points..even then i am getting the same problem...have you tried copying the code to ur VC 6.0 and tried to complie?

I dont know where i m going wrong Suspicious | :suss:

-NA

David Crow4-Apr-07 3:04

David Crow

4-Apr-07 3:04

Nandu_77b wrote:
have you tried copying the code to ur VC 6.0 and tried to complie?

Yes, it works fine. The two files look like:

*** STDAFX.H ***
#include <afx.h>
#include <afxwin.h>
#include <afxext.h>
#include <afxdtctl.h>
#ifndef _AFX_NO_AFXCMN_SUPPORT
#include <afxcmn.h>
#endif // _AFX_NO_AFXCMN_SUPPORT
#include <winsock2.h>
#include <iostream>
#include <conio.h>
 
*** MAIN.CPP ***
#include "stdafx.h"
#include "main.h"
 
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
 
CWinApp theApp;
 
using namespace std;
 
UINT ServerThread(LPVOID pParam)
{
    return 0;
}
 
void _tmain( void )
{
    cout << "Press ESCAPE to terminate program\r\n";
    AfxBeginThread(ServerThread, 0);
    while (getch() != 27);
}

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Nandu_77b5-Apr-07 3:35

5-Apr-07 3:35

Hi David,

Actualy what I did is I have included the afxwin.h in .cpp file rather than in stdafx.h. Now i included the afxwin.h in stdafx.h file it works fine.

But i dont know why it is throwing the error (fatal error C1189: #error : WINDOWS.H already included. MFC apps must not #include <windows.h>) when i tried to INCLUDE THE afxwin.f in .cpp file.

Any how thanks for your support...have a nice day

ThatsAlok18-Apr-07 20:30

ThatsAlok

18-Apr-07 20:30

use CreateThread instead of AfxBeginThread

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

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and you

Shared memory with CreateDIBSection

ThatsAlok18-Apr-07 20:34

ThatsAlok

18-Apr-07 20:34

are you sure that you working on MFC application!

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

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and you

HANDLE Problem

micutzu3-Apr-07 3:51

micutzu

3-Apr-07 3:51

Hello,

I have a c++ application that I develop. I use Performance Counters in order to check its system usage. The HANDLES used are continuously increasing when I perform the following operations:

Open file – using fopen (I always close the files with fclose)
String operations – using standard c functions like strcmp, sprintf and so on

If anyone can point me a good article or solution (to check why the handles are increasing) I would highly appreciate it.

Thanks.

phieu3-Apr-07 3:43

3-Apr-07 3:43

Hi all,
I want to create a bitmap by the function CreateDIBSection, and share the bitmap with other process.
HBITMAP CreateDIBSection(
HDC hdc, // handle to DC
CONST BITMAPINFO *pbmi, // bitmap data
UINT iUsage, // data type indicator
VOID **ppvBits, // bit values
HANDLE hSection, // handle to file mapping object
DWORD dwOffset // offset to bitmap bit values
);
Following MSDN, hSection is handle that created by CreateFileMapping.
Now I want ask that: in the shared-memory that hold by handle hSection: what is shared data? it is ppvBits?. If not, what is relating between ppvBits and data shared in the memory. I don't see any word in MSDN about this.
That is good if anyone give me a sample code.

Thank you.

The world is not enough!

A freeware MFC class to encapsulate Memory Mapped Files[^]

KaЯl3-Apr-07 4:42

KaЯl

3-Apr-07 4:42

You could have a look to these two articles:

Share variables in the shared memory across processes[^]

Where do you expect us to go when the bombs fall?

Fold with us! ¤ flickr

Mark Salsbery3-Apr-07 7:32

3-Apr-07 7:32

phieu wrote:
what is shared data? it is ppvBits?.

If you've provided a file mapping (hSection) then the data pointed to by ppvBits can be shared
through the file mapping. To do that, refer to the links suggested above Smile | :)

Mark

"If you can dodge a wrench, you can dodge a ball."

phieu3-Apr-07 18:29

3-Apr-07 18:29

Thanks Mark.

OK, Now I see the data pointed to by ppvBits can be shared
through the file mapping.

But now I don’t know why: error code = 87 (ERROR_INVALID_PARAMETER) when
I call CreateDIBSection thought out but bitmap is valid.

Someone can tell me why?
Thank you.

Here is my code:

#define BITMAP_MMF_NAME "Global\\PRJ_IMS"
HANDLE m_hMMF;
HBITMAP m_hBitmap;
void CBitmapMMFDlg::OnButton3()
{
// TODO: この位置にコントロール通知ハンドラ用のコードを追加してください
int nWidth = 100, nHeight = 100;
long nSize = nWidth*nHeight*3;
// Create a file-mapping
m_hMMF = ::CreateFileMapping(
(HANDLE)0xFFFFFFFF,
NULL,
PAGE_READWRITE,
0,
nSize,
BITMAP_MMF_NAME);
DWORD dw = GetLastError();
if (m_hMMF)
{
// Create bitmap and map this bitmap to File-mapping
m_hBitmap = NULL;
HDC hdc = ::GetDC(NULL); // entire screen
//off-screen bitmap/image size - width must be DWORD aligned (multiples of 4)
LONG sizeImage = ((nWidth * 3 + 3) & 0xfffffffc) * nHeight;
BITMAPINFO bmpInfo;
memset(&bmpInfo,0,sizeof(bmpInfo));
bmpInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmpInfo.bmiHeader.biWidth = nWidth;
bmpInfo.bmiHeader.biHeight = -nHeight;
bmpInfo.bmiHeader.biPlanes = 1;
bmpInfo.bmiHeader.biBitCount = 24;
bmpInfo.bmiHeader.biCompression = BI_RGB;
bmpInfo.bmiHeader.biSizeImage = sizeImage ;
bmpInfo.bmiHeader.biXPelsPerMeter = 0;
bmpInfo.bmiHeader.biYPelsPerMeter = 0;
bmpInfo.bmiHeader.biClrUsed = 0;
bmpInfo.bmiHeader.biClrImportant = 0;

//Create DIB Section - off screen bitmap
void* pBits = NULL;
DWORD dwOffset = 0;
m_hBitmap = CreateDIBSection(hdc, &bmpInfo, DIB_RGB_COLORS, &pBits, m_hMMF, dwOffset);
TRACE("Error code = %d \n", GetLastError());
// change bitmap bit data -> to test output
if(pBits != NULL)
{
for (int i = 0; i < 30000; i ++)
{
*((char*)(pBits) +i) = i%255;
}
}
/////////////////////////////////////////////////
// display bitmap
if (m_hBitmap != NULL)
{
CDC* pDC = GetDlgItem(IDC_STATIC)->GetDC();
if (pDC)
{
CDC dcMem;
dcMem.CreateCompatibleDC(pDC);
CBitmap* pBmp = CBitmap::FromHandle(m_hBitmap);
CBitmap* pOldBmp= dcMem.SelectObject(pBmp);
pDC->BitBlt(0,0, 100, 100, &dcMem, 0, 0, SRCCOPY);
}
}
}
}

Mark Salsbery3-Apr-07 19:43

3-Apr-07 19:43

I don't see anything right away...
Try changing to
bmpInfo.bmiHeader.biSizeImage = 0;

Also you calculate your file mapping size like this:
long nSize = nWidth*nHeight*3;
and your bmpInfo.bmiHeader.biSizeImage like this
LONG sizeImage = ((nWidth * 3 + 3) & 0xfffffffc) * nHeight;

Both should use the same calculation and the second method is better since DIB rows should be
aligned to a 4-byte boundary. In this case it's ok with a rowsize of 100 Smile | :)

Mark

"If you can dodge a wrench, you can dodge a ball."

Mark Salsbery3-Apr-07 19:51

3-Apr-07 19:51

Is m_hBitmap NULL after the CreateDIBSection call?

"If you can dodge a wrench, you can dodge a ball."

phieu4-Apr-07 1:15

4-Apr-07 1:15

m_hBitmap is not NULL, and I can display it ok, but GetLastError() = 87, INVALID_PARAMETER. I don't know why?

Mark Salsbery4-Apr-07 7:24

4-Apr-07 7:24

If it's not NULL then it was successful and calling GetLastError() isn't necessarily valid.
You only need to call that on failure.

From the docs:
"Most functions that set the thread's last-error code set it when they fail. However, some
functions also set the last-error code when they succeed. If the function is not documented to
set the last-error code, the value returned by this function is simply the most recent last-error
code to have been set; some functions set the last-error code to 0 on success and others do not."

Generally errors are checked for and handled something like:

m_hBitmap = CreateDIBSection(hdc, &bmpInfo, DIB_RGB_COLORS, &pBits, m_hMMF, dwOffset);
if (NULL == m_hBitmap)
{
TRACE("Error code = %d \n", GetLastError());
...do appropriate error handling/cleanup here
}

"If you can dodge a wrench, you can dodge a ball."

phieu4-Apr-07 17:04

4-Apr-07 17:04

Ok, thanks Mark!

GINA and the net

SeaSol3-Apr-07 3:29

SeaSol

3-Apr-07 3:29

I am trying to write a GINA, but am faced with a problem... I need to retrieve some info over the internet/intranet. Does anyone know if this is possible, if so how would I go about it? Confused | :confused:

I have samples of writing a GINA, but all point to simply adding the password either from biometric readers or smartcards, I need to fetch a template over the net, scramble it and present it to the logon user (in a webpage).

Any ideas?

Thank you,
SeaSol

RichEditCtrl - RTF

Ashok Panchal3-Apr-07 3:27

Ashok Panchal

3-Apr-07 3:27

Hi,

I want to read RTF file in Chunk by chunk.
And I want to append in StreamIn i.e. RichEditCtrl.

But Chunk by chunk upending is not working. If I read
whole file in buffer and append/insert, it works fine.

I set SF_RTF and SFF_SELECTION flags for StreamIn.

If anyone knows about RTF & RichEdit control,
please help me.

Ashok

Re: RichEditCtrl - RTF

Mark Salsbery3-Apr-07 7:36