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Build your own cryptographically safe server/client protocol

, 21 Jun 2006
This article presents all you need to implement your own secure protocol using variable keysize RSA encryption/decryption, digital signing, multi precision library, Diffie-Hellman key exchange, Rijndael, and more. Everything is converged into a secure IOCP client/server chat server.
/*
*  HistoryEdit.cpp
*
*  Description:
*    CHistoryEdit implementation
*
*    A CEdit subclass that allows you to display a text history
*    of events.
*
*  Author:
*    Ravi Bhavnani (ravib@datablast.net)
*
*  Revision History:
*    15 Mar 1998   rab   Original version
*/

#include "stdafx.h"
#include "HistoryEdit.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CHistoryEdit

CHistoryEdit::CHistoryEdit()
{
	m_bSelectable = FALSE;
}

CHistoryEdit::~CHistoryEdit()
{
}

BEGIN_MESSAGE_MAP(CHistoryEdit, CEdit)
//{{AFX_MSG_MAP(CHistoryEdit)
ON_WM_SETFOCUS()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CHistoryEdit operations

void CHistoryEdit::AppendString
(CString str)
//
//  Purpose:
//    Appends a text string to the history buffer.
//
//  Returns:
//    None.
//
{
	CString   strBuffer;    // current contents of edit control
	
	// Append string
	GetWindowText (strBuffer);
	if (!strBuffer.IsEmpty())
		strBuffer += "\r\n";
	strBuffer += str;
	SetWindowText (strBuffer);
	//UpdateData(FALSE);
	//Invalidate();
	// Scroll the edit control
	LineScroll (GetLineCount(), 0);
}

/////////////////////////////////////////////////////////////////////////////
// CHistoryEdit message handlers

void CHistoryEdit::OnSetFocus(CWnd* pOldWnd) 
{
	// Don't allow user to select text
	if (m_bSelectable)
		CEdit::OnSetFocus (pOldWnd);
	else
		pOldWnd->SetFocus();
}

// End EditHistroy.cpp

void CHistoryEdit::Clear()
{
	SetWindowText ("");
}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

About the Author

spinoza
Program Manager
Sweden Sweden
Amin Gholiha.
Education:
- Master of Science in Information Technology.
- Degree of Master of Education.
Knowledge/interest: programming (.NET,Visual, C#/C++), neural network, mathematical modeling, signal processing, sequence analysis, pattern recognition,robot technology, system design, security and business management systems. For business proposal email Gholiha@rocketmail.com, all other emails will be ignored.
Current Work:
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