Sockets trouble in Visual Studio 2008 - C / C++ / MFC Discussion Boards

I'm still new to learning C++ (learned some of C# first) and having a hard time knowing what the preferred way to handle this situation is.

I have a class that has a constructor that does some initialization work. If this initialization fails, I want to inform the program that this is not a valid object to use. I created my constructor to throw an exception as that is really the only way that I know how (since constructors can't return values).

Now, in my program I am trying to create an object of my class so I put a try/catch block around it. This worked great until I realized that no code outside of the try/catch block would be able to use that object because it is out of scope.

It appears that there is no good way to use global variables that has a constructor that throws an exception. So what is the normal procedure for this type of situation. Do you normally create a pointer to the object so that you can use the new keyword to create the object? If so, is there a way to prevent someone from creating an object and not a point to your class?

hpjchobbes wrote:
So what is the normal procedure for this type of situation. Do you normally create a pointer to the object so that you can use the new keyword to create the object?

Yes, that's what I'd do.

hpjchobbes wrote:
If so, is there a way to prevent someone from creating an object and not a point to your class?

Make the constructors private and add a static method that returns a newly allocated object:

class C
{
public:
   static C* MakeNewC() { return new C; }
private:
   C()
   {
   }
};

int main()
{
   C c; // This won't compile
   C* pC = C::MakeNewC(); // This will compile
}

HTH!!!

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

I'm trying to automate IE. That piece of code works fine on my VC++ desktop computer with vista and IE8. The problem is it's not working on my laptop (vista + IE7). There is no error message. According to the messageboxes, the code stops when trying to get the READYSTATE statement. I mean I got the first messagebox ("navigation ...") but not the second one ("readystate ..."). Plus the browser doesn't close as it is supposed to do.

I don't know if it's related but I compiled the project using the /MT command and I didn't install the Visual C++ 2008 Redistributable Package (x86) on the laptop. This is because I want to run this code as a single exe.

Can please someone help me to understand wht is going on ?

Here is my code :

#include "stdafx.h"
#include "Exdisp.h"
#include "mshtml.h"
#include "windows.h"
#include "winerror.h"



int _tmain(int argc, _TCHAR* argv[])
{
if (SUCCEEDED(OleInitialize(NULL)))
  {
    IWebBrowser2*    pBrowser2;
	IHTMLDocument2*  Doc;
	IDispatch* pHtmlDispatch;
	READYSTATE rState;
	DWebBrowserEvents2* pEvents;
	HRESULT hr;

   CoCreateInstance(CLSID_InternetExplorer, NULL, CLSCTX_LOCAL_SERVER, 
                       IID_IWebBrowser2, (void**)&pBrowser2);
   if (pBrowser2)
     {
			
		VARIANT vEmpty;
		VariantInit(&vEmpty);

		BSTR bstrURL = SysAllocString(L"http://www.google.com");

		hr = pBrowser2->Navigate(bstrURL, &vEmpty, &vEmpty, &vEmpty, &vEmpty);
		if (SUCCEEDED(hr))
        {
			MessageBox(NULL, TEXT("Navigation successful"),TEXT("Status"),MB_OK);
			pBrowser2->put_Visible(VARIANT_TRUE);
			
		   
			
			do
			{
				hr = pBrowser2->get_ReadyState(&rState);
			}while(hr == S_OK && rState != READYSTATE_COMPLETE);
			
			MessageBox(NULL, TEXT("ReadyState Complete"),TEXT("Status"),MB_OK);
         }
      
       SysFreeString(bstrURL);


       hr = pBrowser2->get_Document(&pHtmlDispatch);
	    if (SUCCEEDED(hr) && (pHtmlDispatch != NULL)) 
         {
			MessageBox(NULL, TEXT("Dispatch obtained"),TEXT("Status"),MB_OK);
			hr = pHtmlDispatch->QueryInterface(IID_IHTMLDocument2, (void**)&Doc);
			if (SUCCEEDED (hr) && (Doc != NULL))
			{
				MessageBox(NULL, TEXT("Document obtained"),TEXT("Status"),MB_OK);
				




				Doc->Release();
			}
			else
			{
				return hr;
			}
			pHtmlDispatch->Release();
        }
		else
		{
			return hr;
		}


		pBrowser2->Quit();
		pBrowser2->Release();
     }

   OleUninitialize();
  }

	return 0;
}

modified on Friday, July 3, 2009 2:40 PM

I do wonder if it's something to do with not having an active windows message loop (which COM uses for marshalling calls with single threaded apartments, IIRC) - I mean, you do while the message box is active, but not afterwards - maybe the laptop's slower at getting to the readystate=complete? After all, IE7 is slow as a dog compared to real browsers, even IE8!

So - might be worth adding message dispatch in the do/while loops?

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Hi,

I typed in the following code and found it to compile and run ok (using VS 2003).

<br />
#include < iostream ><br />
using namespace std;<br />
   <br />
template <class T , class U> void  swapa(T & a, U & b)<br />
{<br />
	cout << a << " " << b;<br />
}<br />
 <br />
int main()<br />
{   <br />
<br />
   int x = 3;<br />
   const double y =5.234;<br />
   swapa < int , const  /* should'nt the "double" be explicitly stated here? */  > (x, y);<br />
     <br />
   return 0;<br />
}<br />

I am surprised of this as I did not declare the type explicitly in the invocation of swapa() where the comment is. Can someone pls explain?

Many thanks!

minkowski wrote:
template void swapa(T & a, U & b)

Isn't it

template void <class T, class U> void swapa(T & a, U & b)

?

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

It's a non-compliance in VS2003. Both gcc4.0.1 and VS2008 raise an error on that line:

gcc4.0.1 =>

Desktop$ g++ -o a a.cpp
a.cpp: In function ‘int main()’:
a.cpp:16: error: ISO C++ forbids declaration of ‘type name’ with no type

VS2008 =>

cl -EHsc -O2 a.cpp
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 15.00.30729.01 for 80x86
Copyright (C) Microsoft Corporation.  All rights reserved.

a.cpp
a.cpp(16) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

I' m a learner in visual c++ developing environment.
Here's m problem . . .
------------------------>

I am using a tutorial to make a simple program to send messages to another program using CAsyncSocket class.
I wrote complete application's code as given in the example(in visual studio 6 IDE). I compiled the application and the program run successfully without any errors. Smile | :)

Then I compiled same program in visual studio 2008(Professional Edition) and It also run as expected. Smile | :)

But When I wrote the same program from scratch in visual studio 2008 it showed some misbehavior while receiving data. Confused | :confused:

The main problem with the code given below is that it sends data(as shown in the code below) but on the receiving application only first byte is received(When project is written from scratch in VS 2008 Pro).
But if application is written in Visual studio 6 then there is no such problem.
I' m totally confused what to do? where is the problem actually residing? Please send any suggestion.

-->I have VC++ 2008 FeaturePack installed.
-->Create an MFC Application named "Sockets" and link MFC as statically.
-->then use files below to make the application.
The individual codes of my complete application's source files is given here:-

//---------------------------------------------------------------------------------------------------
// MySocket.h
#pragma once

// CMySocket command target

class CMySocket : public CAsyncSocket
{
public:
	CMySocket();
	virtual ~CMySocket();
private:
	CDialog* m_pWnd;
public:
	void SetParent(CDialog* pWnd);
protected:
	virtual void OnAccept(int nErrorCode);
	virtual void OnConnect(int nErrorCode);
	virtual void OnClose(int nErrorCode);
	virtual void OnReceive(int nErrorCode);
	virtual void OnSend(int nErrorCode);
};
//---------------------------------------------------------------------------------------------------

//---------------------------------------------------------------------------------------------------
// MySocket.cpp : implementation file
//

#include "stdafx.h"
#include "Sockets.h"
#include "MySocket.h"

#include "SocketsDlg.h"


// CMySocket

CMySocket::CMySocket()
: m_pWnd(NULL)
{
}

CMySocket::~CMySocket()
{
}


// CMySocket member functions

void CMySocket::SetParent(CDialog* pWnd)
{
	m_pWnd = pWnd;
}

void CMySocket::OnAccept(int nErrorCode)
{
	if(nErrorCode == 0)
		((CSocketsDlg*)m_pWnd)->OnAccept();
}

void CMySocket::OnConnect(int nErrorCode)
{
	if(nErrorCode == 0)
		((CSocketsDlg*)m_pWnd)->OnConnect();
}

void CMySocket::OnClose(int nErrorCode)
{
	if(nErrorCode == 0)
		((CSocketsDlg*)m_pWnd)->OnClose();
}

void CMySocket::OnReceive(int nErrorCode)
{
	if(nErrorCode == 0)
		((CSocketsDlg*)m_pWnd)->OnReceive();
}

void CMySocket::OnSend(int nErrorCode)
{
	if(nErrorCode == 0)
		((CSocketsDlg*)m_pWnd)->OnSend();
}

//---------------------------------------------------------------------------------------------------

//---------------------------------------------------------------------------------------------------

// SocketsDlg.h : header file
//

#pragma once
#include "afxwin.h"
#include "mysocket.h"


// CSocketsDlg dialog
class CSocketsDlg : public CDialog
{
// Construction
public:
	CSocketsDlg(CWnd* pParent = NULL);	// standard constructor

// Dialog Data
	enum { IDD = IDD_SOCKETS_DIALOG };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);	// DDX/DDV support


// Implementation
protected:
	HICON m_hIcon;

	// Generated message map functions
	virtual BOOL OnInitDialog();
	afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
	afx_msg void OnPaint();
	afx_msg HCURSOR OnQueryDragIcon();
	DECLARE_MESSAGE_MAP()
public:
	CButton m_ctlConnect;
	CString m_strMessage;
	CString m_strName;
	int m_iPort;
	CListBox m_ctlRecvd;
	CListBox m_ctlSent;
	int m_iType;
	afx_msg void OnRType();
private:
	CMySocket m_sListenSocket;
	CMySocket m_sConnectSocket;
public:
	afx_msg void OnBnClickedBconnect();
	void OnAccept(void);
	void OnConnect(void);
	void OnSend(void);
	void OnReceive(void);
	void OnClose(void);
	afx_msg void OnBnClickedBsend();
	afx_msg void OnBnClickedBclose();
};

//---------------------------------------------------------------------------------------------------

//---------------------------------------------------------------------------------------------------

// SocketsDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Sockets.h"
#include "SocketsDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	enum { IDD = IDD_ABOUTBOX };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support

// Implementation
protected:
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()


// CSocketsDlg dialog




CSocketsDlg::CSocketsDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CSocketsDlg::IDD, pParent)
	, m_strMessage(_T(""))
	, m_strName(_T(""))
	, m_iPort(0)
	, m_iType(0)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CSocketsDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	DDX_Control(pDX, IDC_BCONNECT, m_ctlConnect);
	DDX_Text(pDX, IDC_EMSG, m_strMessage);
	DDX_Text(pDX, IDC_ESERVNAME, m_strName);
	DDX_Text(pDX, IDC_ESERVPORT, m_iPort);
	DDX_Control(pDX, IDC_LRECVD, m_ctlRecvd);
	DDX_Control(pDX, IDC_LSENT, m_ctlSent);
	DDX_Radio(pDX, IDC_RCLIENT, m_iType);
}

BEGIN_MESSAGE_MAP(CSocketsDlg, CDialog)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
	ON_BN_CLICKED(IDC_RCLIENT, &CSocketsDlg::OnRType)
	ON_BN_CLICKED(IDC_BCONNECT, &CSocketsDlg::OnBnClickedBconnect)
	ON_BN_CLICKED(IDC_BSEND, &CSocketsDlg::OnBnClickedBsend)
	ON_BN_CLICKED(IDC_BCLOSE, &CSocketsDlg::OnBnClickedBclose)
END_MESSAGE_MAP()


// CSocketsDlg message handlers

BOOL CSocketsDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		BOOL bNameValid;
		CString strAboutMenu;
		bNameValid = strAboutMenu.LoadString(IDS_ABOUTBOX);
		ASSERT(bNameValid);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon

	// TODO: Add extra initialization here
	// Initialize control variables
	m_iType = 0;
	m_strName = "loopback";
	m_iPort = 4000;
	// Update the controls
	UpdateData(FALSE);
	m_sConnectSocket.SetParent(this);
	m_sListenSocket.SetParent(this);

	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CSocketsDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CSocketsDlg::OnPaint()
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this function to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CSocketsDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}


void CSocketsDlg::OnRType()
{
	// TODO: Add your control notification handler code here
	UpdateData(TRUE);
	if(m_iType == 0)
		m_ctlConnect.SetWindowTextW(_T("Connect"));
	else
		m_ctlConnect.SetWindowTextW(_T("Listen"));
}

void CSocketsDlg::OnBnClickedBconnect()
{
	// TODO: Add your control notification handler code here
	// Sync controls with variables
	UpdateData(TRUE);
	// Disable connection and type controls
	GetDlgItem(IDC_BCONNECT)->EnableWindow(FALSE);
	GetDlgItem(IDC_ESERVNAME)->EnableWindow(FALSE);
	GetDlgItem(IDC_ESERVPORT)->EnableWindow(FALSE);
	GetDlgItem(IDC_STATICNAME)->EnableWindow(FALSE);
	GetDlgItem(IDC_STATICPORT)->EnableWindow(FALSE);
	GetDlgItem(IDC_RCLIENT)->EnableWindow(FALSE);
	GetDlgItem(IDC_RSERVER)->EnableWindow(FALSE);
	GetDlgItem(IDC_STATICTYPE)->EnableWindow(FALSE);
	// Are we running as client as or server
	if(m_iType == 0)
	{
		// CLient, create default socket
		m_sConnectSocket.Create();
		m_sConnectSocket.Connect(m_strName, m_iPort);
	}
	else
	{
		// Server, create a socket bound to a specific port
		m_sListenSocket.Create(m_iPort);
		m_sListenSocket.Listen();
	}
}

void CSocketsDlg::OnAccept(void)
{
	// Accept the connection request
	m_sListenSocket.Accept(m_sConnectSocket);
	// Enable text and message controls
	GetDlgItem(IDC_EMSG)->EnableWindow(TRUE);
	GetDlgItem(IDC_BSEND)->EnableWindow(TRUE);
	GetDlgItem(IDC_STATICMSG)->EnableWindow(TRUE);
}

void CSocketsDlg::OnConnect(void)
{
	// Enable message and text controls
	GetDlgItem(IDC_EMSG)->EnableWindow(TRUE);
	GetDlgItem(IDC_BSEND)->EnableWindow(TRUE);
	GetDlgItem(IDC_STATICMSG)->EnableWindow(TRUE);
	GetDlgItem(IDC_BCLOSE)->EnableWindow(TRUE);
}

void CSocketsDlg::OnSend(void)
{
}

void CSocketsDlg::OnReceive(void)
{
	char *pBuf = new char[1025];
	int iBufSize = 1024;
	int iRcvd;
	CString strRecvd;

	// Receive the message
	iRcvd = m_sConnectSocket.Receive(pBuf, iBufSize);
	if(iRcvd == SOCKET_ERROR)
	{
	}
	else
	{
		// Truncate the end of message
		pBuf[iRcvd] = NULL;
		strRecvd = pBuf;
		m_ctlRecvd.AddString(strRecvd);
		UpdateData(FALSE);
	}
}

void CSocketsDlg::OnClose(void)
{
	// Close connected socket
	m_sConnectSocket.Close();
	// Disable message sending controls
	GetDlgItem(IDC_EMSG)->EnableWindow(FALSE);
	GetDlgItem(IDC_BSEND)->EnableWindow(FALSE);
	GetDlgItem(IDC_STATICMSG)->EnableWindow(FALSE);
	GetDlgItem(IDC_BCLOSE)->EnableWindow(FALSE);
	// Are we running in client mode
	if(m_iType == 0)
	{
		// Enable connection controls
		GetDlgItem(IDC_BCONNECT)->EnableWindow(TRUE);
		GetDlgItem(IDC_ESERVNAME)->EnableWindow(TRUE);
		GetDlgItem(IDC_ESERVPORT)->EnableWindow(TRUE);
		GetDlgItem(IDC_STATICNAME)->EnableWindow(TRUE);
		GetDlgItem(IDC_STATICPORT)->EnableWindow(TRUE);
		GetDlgItem(IDC_RCLIENT)->EnableWindow(TRUE);
		GetDlgItem(IDC_RSERVER)->EnableWindow(TRUE);
		GetDlgItem(IDC_STATICTYPE)->EnableWindow(TRUE);
	}
}

void CSocketsDlg::OnBnClickedBsend()
{
	// TODO: Add your control notification handler code here
	int iLen;
	int iSent;
	// Sync variables with controls
	UpdateData(TRUE);
	// Is there a message to be sent
	if(m_strMessage != "")
	{
		// Get lenght of message
		iLen = m_strMessage.GetLength();
		iSent = m_sConnectSocket.Send(LPCTSTR(m_strMessage), iLen);
		if(iSent == SOCKET_ERROR)
		{
		}
		else
		{
			m_ctlSent.AddString(m_strMessage);
			UpdateData(FALSE);
		}
	}
}

void CSocketsDlg::OnBnClickedBclose()
{
	// TODO: Add your control notification handler code here
	OnClose();
}

//---------------------------------------------------------------------------------------------------

//---------------------------------------------------------------------------------------------------
//{{NO_DEPENDENCIES}}
// Microsoft Visual C++ generated include file.
// Used by Sockets.rc
//
#define IDM_ABOUTBOX                    0x0010
#define IDD_ABOUTBOX                    100
#define IDS_ABOUTBOX                    101
#define IDD_SOCKETS_DIALOG              102
#define IDP_SOCKETS_INIT_FAILED         103
#define IDR_MAINFRAME                   128
#define IDC_BCONNECT                    1000
#define IDC_BCLOSE                      1001
#define IDC_BSEND                       1002
#define IDC_EMSG                        1003
#define IDC_ESERVNAME                   1004
#define IDC_ESERVPORT                   1005
#define IDC_LSENT                       1006
#define IDC_LRECVD                      1007
#define IDC_RCLIENT                     1008
#define IDC_RSERVER                     1009
#define IDC_STATICNAME                  1010
#define IDC_STATICPORT                  1011
#define IDC_STATICMSG                   1012
#define IDC_STATICTYPE                  1013
#define IDC_STATICSENT                  1014

// Next default values for new objects
// 
#ifdef APSTUDIO_INVOKED
#ifndef APSTUDIO_READONLY_SYMBOLS
#define _APS_NEXT_RESOURCE_VALUE        129
#define _APS_NEXT_COMMAND_VALUE         32771
#define _APS_NEXT_CONTROL_VALUE         1015
#define _APS_NEXT_SYMED_VALUE           101
#endif
#endif

//---------------------------------------------------------------------------------------------------

//---------------------------------------------------------------------------------------------------
// Sockets Resoure Script
// Microsoft Visual C++ generated resource script.
// Sockets.rc
#include "resource.h"

#define APSTUDIO_READONLY_SYMBOLS
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 2 resource.
//
#ifndef APSTUDIO_INVOKED
#include "targetver.h"
#endif
#include "afxres.h"

/////////////////////////////////////////////////////////////////////////////
#undef APSTUDIO_READONLY_SYMBOLS

/////////////////////////////////////////////////////////////////////////////
// English (U.S.) resources

#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
#ifdef _WIN32
LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
#pragma code_page(1252)
#endif //_WIN32

#ifdef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// TEXTINCLUDE
//

1 TEXTINCLUDE 
BEGIN
    "resource.h\0"
END

2 TEXTINCLUDE 
BEGIN
    "#ifndef APSTUDIO_INVOKED\r\n"
    "#include ""targetver.h""\r\n"
    "#endif\r\n"
    "#include ""afxres.h""\r\n"
    "\0"
END

3 TEXTINCLUDE 
BEGIN
    "#define _AFX_NO_SPLITTER_RESOURCES\r\n"
    "#define _AFX_NO_OLE_RESOURCES\r\n"
    "#define _AFX_NO_TRACKER_RESOURCES\r\n"
    "#define _AFX_NO_PROPERTY_RESOURCES\r\n"
    "\r\n"
    "#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)\r\n"
    "LANGUAGE 9, 1\r\n"
    "#pragma code_page(1252)\r\n"
    "#include ""res\\Sockets.rc2""  // non-Microsoft Visual C++ edited resources\r\n"
    "#include ""afxres.rc""     // Standard components\r\n"
    "#endif\r\n"
    "\0"
END

#endif    // APSTUDIO_INVOKED


/////////////////////////////////////////////////////////////////////////////
//
// Icon
//

// Icon with lowest ID value placed first to ensure application icon
// remains consistent on all systems.
IDR_MAINFRAME           ICON                    "res\\Sockets.ico"

/////////////////////////////////////////////////////////////////////////////
//
// Dialog
//

IDD_ABOUTBOX DIALOGEX 0, 0, 170, 62
STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | WS_POPUP | WS_CAPTION | WS_SYSMENU
CAPTION "About Sockets"
FONT 8, "MS Shell Dlg", 0, 0, 0x1
BEGIN
    ICON            IDR_MAINFRAME,IDC_STATIC,14,14,21,20
    LTEXT           "Sockets, Version 1.0",IDC_STATIC,42,14,114,8,SS_NOPREFIX
    LTEXT           "Copyright (C) 2009",IDC_STATIC,42,26,114,8
    DEFPUSHBUTTON   "OK",IDOK,113,41,50,14,WS_GROUP
END

IDD_SOCKETS_DIALOG DIALOGEX 0, 0, 280, 198
STYLE DS_SETFONT | DS_MODALFRAME | DS_FIXEDSYS | WS_MINIMIZEBOX | WS_POPUP | WS_VISIBLE | WS_CAPTION | WS_SYSMENU
EXSTYLE WS_EX_APPWINDOW
CAPTION "Sockets"
FONT 8, "MS Shell Dlg", 0, 0, 0x1
BEGIN
    PUSHBUTTON      "Connect",IDC_BCONNECT,223,16,50,14
    PUSHBUTTON      "Close",IDC_BCLOSE,223,35,50,14,WS_DISABLED
    PUSHBUTTON      "Send",IDC_BSEND,223,58,50,14,WS_DISABLED
    EDITTEXT        IDC_EMSG,61,57,156,14,ES_AUTOHSCROLL | WS_DISABLED
    LTEXT           "Server Name :",IDC_STATICNAME,64,15,47,8
    LTEXT           "Server Port :",IDC_STATICPORT,69,36,42,8
    LTEXT           "Message :",IDC_STATICMSG,22,59,34,8,WS_DISABLED
    EDITTEXT        IDC_ESERVNAME,113,14,104,14,ES_AUTOHSCROLL
    EDITTEXT        IDC_ESERVPORT,113,33,52,14,ES_AUTOHSCROLL
    LTEXT           "Sent :",IDC_STATIC,36,81,20,8
    LTEXT           "Received :",IDC_STATIC,21,135,35,8
    LISTBOX         IDC_LSENT,61,79,212,55,LBS_NOINTEGRALHEIGHT | LBS_NOSEL | WS_VSCROLL
    LISTBOX         IDC_LRECVD,61,136,212,55,LBS_NOINTEGRALHEIGHT | LBS_NOSEL | WS_VSCROLL
    GROUPBOX        "Socket Type",IDC_STATICTYPE,7,7,51,47
    CONTROL         "Client",IDC_RCLIENT,"Button",BS_AUTORADIOBUTTON | WS_GROUP,16,23,34,10
    CONTROL         "Server",IDC_RSERVER,"Button",BS_AUTORADIOBUTTON,15,38,37,10
END


/////////////////////////////////////////////////////////////////////////////
//
// Version
//

VS_VERSION_INFO VERSIONINFO
 FILEVERSION 1,0,0,1
 PRODUCTVERSION 1,0,0,1
 FILEFLAGSMASK 0x3fL
#ifdef _DEBUG
 FILEFLAGS 0x1L
#else
 FILEFLAGS 0x0L
#endif
 FILEOS 0x4L
 FILETYPE 0x1L
 FILESUBTYPE 0x0L
BEGIN
    BLOCK "StringFileInfo"
    BEGIN
        BLOCK "040904e4"
        BEGIN
            VALUE "CompanyName", "TODO: <Company name>"
            VALUE "FileDescription", "TODO: <File description>"
            VALUE "FileVersion", "1.0.0.1"
            VALUE "InternalName", "Sockets.exe"
            VALUE "LegalCopyright", "TODO: (c) <Company name>.  All rights reserved."
            VALUE "OriginalFilename", "Sockets.exe"
            VALUE "ProductName", "TODO: <Product name>"
            VALUE "ProductVersion", "1.0.0.1"
        END
    END
    BLOCK "VarFileInfo"
    BEGIN
        VALUE "Translation", 0x409, 1252
    END
END


/////////////////////////////////////////////////////////////////////////////
//
// DESIGNINFO
//

#ifdef APSTUDIO_INVOKED
GUIDELINES DESIGNINFO 
BEGIN
    IDD_ABOUTBOX, DIALOG
    BEGIN
        LEFTMARGIN, 7
        RIGHTMARGIN, 163
        TOPMARGIN, 7
        BOTTOMMARGIN, 55
    END

    IDD_SOCKETS_DIALOG, DIALOG
    BEGIN
        LEFTMARGIN, 7
        RIGHTMARGIN, 273
        TOPMARGIN, 7
        BOTTOMMARGIN, 191
    END
END
#endif    // APSTUDIO_INVOKED


/////////////////////////////////////////////////////////////////////////////
//
// String Table
//

STRINGTABLE 
BEGIN
    IDS_ABOUTBOX            "&About Sockets..."
    IDP_SOCKETS_INIT_FAILED "Windows sockets initialization failed."
END

#endif    // English (U.S.) resources
/////////////////////////////////////////////////////////////////////////////



#ifndef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 3 resource.
//
#define _AFX_NO_SPLITTER_RESOURCES
#define _AFX_NO_OLE_RESOURCES
#define _AFX_NO_TRACKER_RESOURCES
#define _AFX_NO_PROPERTY_RESOURCES

#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
LANGUAGE 9, 1
#pragma code_page(1252)
#include "res\Sockets.rc2"  // non-Microsoft Visual C++ edited resources
#include "afxres.rc"     // Standard components
#endif

/////////////////////////////////////////////////////////////////////////////
#endif    // not APSTUDIO_INVOKED


//---------------------------------------------------------------------------------------------------

//---------------------------------------------------------------------------------------------------

// Sockets.h : main header file for the PROJECT_NAME application
//

#pragma once

#ifndef __AFXWIN_H__
	#error "include 'stdafx.h' before including this file for PCH"
#endif

#include "resource.h"		// main symbols


// CSocketsApp:
// See Sockets.cpp for the implementation of this class
//

class CSocketsApp : public CWinAppEx
{
public:
	CSocketsApp();

// Overrides
	public:
	virtual BOOL InitInstance();

// Implementation

	DECLARE_MESSAGE_MAP()
};

extern CSocketsApp theApp;
//---------------------------------------------------------------------------------------------------

//---------------------------------------------------------------------------------------------------

// Sockets.cpp : Defines the class behaviors for the application.
//

#include "stdafx.h"
#include "Sockets.h"
#include "SocketsDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CSocketsApp

BEGIN_MESSAGE_MAP(CSocketsApp, CWinAppEx)
	ON_COMMAND(ID_HELP, &CWinApp::OnHelp)
END_MESSAGE_MAP()


// CSocketsApp construction

CSocketsApp::CSocketsApp()
{
	// TODO: add construction code here,
	// Place all significant initialization in InitInstance
}


// The one and only CSocketsApp object

CSocketsApp theApp;


// CSocketsApp initialization

BOOL CSocketsApp::InitInstance()
{
	// InitCommonControlsEx() is required on Windows XP if an application
	// manifest specifies use of ComCtl32.dll version 6 or later to enable
	// visual styles.  Otherwise, any window creation will fail.
	INITCOMMONCONTROLSEX InitCtrls;
	InitCtrls.dwSize = sizeof(InitCtrls);
	// Set this to include all the common control classes you want to use
	// in your application.
	InitCtrls.dwICC = ICC_WIN95_CLASSES;
	InitCommonControlsEx(&InitCtrls);

	CWinAppEx::InitInstance();

	if (!AfxSocketInit())
	{
		AfxMessageBox(IDP_SOCKETS_INIT_FAILED);
		return FALSE;
	}

	AfxEnableControlContainer();

	// Standard initialization
	// If you are not using these features and wish to reduce the size
	// of your final executable, you should remove from the following
	// the specific initialization routines you do not need
	// Change the registry key under which our settings are stored
	// TODO: You should modify this string to be something appropriate
	// such as the name of your company or organization
	SetRegistryKey(_T("Local AppWizard-Generated Applications"));

	CSocketsDlg dlg;
	m_pMainWnd = &dlg;
	INT_PTR nResponse = dlg.DoModal();
	if (nResponse == IDOK)
	{
		// TODO: Place code here to handle when the dialog is
		//  dismissed with OK
	}
	else if (nResponse == IDCANCEL)
	{
		// TODO: Place code here to handle when the dialog is
		//  dismissed with Cancel
	}

	// Since the dialog has been closed, return FALSE so that we exit the
	//  application, rather than start the application's message pump.
	return FALSE;
}

//---------------------------------------------------------------------------------------------------

Manmohan Bishnoi

«_Superman_»
I love work. It gives me something to do between weekends.

My guess would be that the 'from scratch in VS2008' version uses Unicode, the 'upgraded from VS6' one uses ASCII. I can see various places where you are (incorrectly) assuming ASCII, but the killer is in CSocketsDlg::OnReceive. Where you read a number of bytes and then append to a CString. The string you've received will have '\0' characters in it, because it's a wchar_t string that you've interpreted as char, so when you append it to a CString, the rlevant method will use strlen to find the string length, see the zero byte after the first character and say 'Aha, that's the end of the string!' - but not where you a) wanted, or b) expected.

So - fix the ASCII assumptions, man!!!! Or turn off Unicode

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Here's some data sent and received b/w both applications and their versions->

(   Visual studio 6   )                              (    VS 2008 Pro     )
---------------------------------------------------------------------------------------
sent               recvd                 |             sent          recvd
---------------------------------------------------------------------------------------
123456789                                |                          123456789
----------------------------------------------------------------------------------------
                   1                                 123456789

I hope this will give u a clear understanding about my BUG.
If u compile these applications then u should get these results.

Manmohan Bishnoi

monu_biosman wrote:
I hope this will give u a clear understanding about my BUG.

I already understand what your bug is, well enough that I told you how to fix it - either turn off Unicode in your app developed from scratch with VS2008, or make your usage of Unicode/ASCII strings consistent.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

how to turnoff Unicode in current project in VS 2008 Pro

Manmohan Bishnoi

Select the project in solution explorer, right-click on it and select Properties from the context menu. Now go to the Configuration Properties->General property page and set the Character Set property to 'Use Multi-Byte Character Set'

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Debug version is working ok but not having xp common controls look.
Release version not working ok but having xp common controls manifest.

Manmohan Bishnoi

Did you change the property for Debug AND Release configurations - the properties are (unfortunately, in many ways) set separately.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

And the manifest file...ummm - is the project property Configuration Properties->Linker->Manifest File->Generate Manifest set to Yes in all cases?

Although it may be that XP themes need Unicode.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

done as u told me to do. But no use.
Anyway atleast debug version got somewhat debugged.

Manmohan Bishnoi

Hi.
I'm stuck with the same problem. Whenever my program receives data from any tcp/ip server, it displays it correctly, but when it sends data back to the server, the latter receives only the first character. Turning off Unicode is not an option, becouse the tcp/ip communication is only a small part of the project, and this change generates lots of other errors. I'm also using the tutorial from David Chapman's "Teach yourself Visual C++ 6...", and Visual Studio 2k8, so my code is almost exactly the same as monu_biosman's.
I'd like to ask Stuart, or anyone else for that matter, what exactly I need to change to make it work. I already made lots of tests, but none seem to work.

//original code: (m_strMessage is a CString)
      iLen = m_strMessage.GetLength();
      iSent = m_sConnectSocket.Send(LPCTSTR(m_strMessage), iLen); 

//I've been changing the iLen, and it's not the problem. Then I've tried:
      iSent = m_sConnectSocket.Send("blablabla", 9);

//and it works!!!. But then I've tried the seemingly same code:
      CString buffer = "blablabla";
      iSent = m_sConnectSocket.Send(buffer, 9);

//and it also sends only one character (b to be exact). So the problem can propably be solved by adding //some type of conversion. So far i've tried this:
      char[1024] buffer;
      wsprintf(buffer,"%s",m_strMessage);
      iSent = m_sConnectSocket.Send(m_strMessage, 1024);
//and.. it does not compile, C2664 error, "'wsprintfW' : cannot convert parameter 1 from 'char [1024]' to 'LPWSTR'"

I'm running out of ideas, or maybe I'm a retard i don't know. Any help would be greatly appreciated. Thanks in advance.

SquiZZlo

Ok, I've found the answer to my problem on another forum:

iLen = m_strMessage.GetLength();
CStringA ansiString(m_strMessage);//one freaking conversion!
iSent = m_sConnectSocket.Send(ansiString, iLen);

Works prefectly! Big Grin | :-D

The print dialog for CHtmlView is a non-modal dialog and I would like to know if there's a way to make it modal. It's annoying that you can close the view (in an MDI app) and the print dialog still sits there - if you then ok it you get an error (as expected as the document no longer exists). The MFC OnFilePrint function uses the OLECMDID_PRINT verb but the parameters available for this are vague. The print dialog in IE itself is modal so why should it be non-modal for other applications? Any answers appreciated.

hi,
i am working on a product based on visual c/cpp.
the product is gui base,and creates window and othe widgets on drag and drop basis.
on creation of a project it creates its own .rc file,a .dat(holds widgets' gui info such as width,color runtime)file,.c,.h and a make file for compiling the application.
now i am facing problem while trying to attach a colored(32x32) .ico file at title bar of a window.
till now i have done:
1.put the .ico file at the correct directory.
2.created a .rc file and put (1 ICON dalocsv.ico) in that file.
3.Now complied the make file with some of the added flags and tha created the .res file which shows the icon at its editor.Also the exe created. But the icon is missing.

CAN SOMEBODY PLZ HELP ME WETHER I AM MISSING SOME STEPS.
OR IS THERE OTHER WAY?????

Thanks in advance
Rajib

Rajib Podder wrote:
i am facing problem while trying to attach a colored(32x32) .ico file at title bar of a window.

As far as I know, the icons in the title bar are 16x16.
If you use file explorer to browse the directory with your exe, you will probably see the 32x32 icon if you select that kind of view in explorer.

Rajib Podder wrote:
CAN SOMEBODY PLZ HELP ME WETHER I AM MISSING SOME STEPS.
OR IS THERE OTHER WAY?????

Please don't shout in the forums.
Read the guidelines[^], especially item #6.

"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown

hi,
as i have already...informed that i have the .res file containing the .ico file.
Now my question is that how can i attach the icon inside my application.
I have already described about my application.
or
please let mr know..if there are any other way out???????????????

Rajib Podder wrote:
i am facing problem while trying to attach a colored(32x32) .ico file at title bar of a window
...
the icon is missing

Roger Stoltz wrote:
the icons in the title bar are 16x16

Rajib Podder wrote:
how can i attach the icon inside my application

As I have already...informed you can't since your icon has the wrong format.
Sleepy | :zzz:

"It's supposed to be hard, otherwise anybody could do it!" - selfquote
"High speed never compensates for wrong direction!" - unknown