How to create a chat client using a set of communication classes

#include "StdAfx.h"
#include "dtsocketbase.h"

Datatal::DtSocketBase::DtSocketBase(void)
{
	m_bReconnect = false;

	//Create events
	m_hNewDataEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
	m_nBufferPos = 0;
	m_lOutBuffers.pFirst = NULL;
	m_lOutBuffers.pLast = NULL;
}

Datatal::DtSocketBase::~DtSocketBase(void)
{
	Disconnect(true);
	CloseHandle(m_hNewDataEvent);
}

bool Datatal::DtSocketBase::Disconnect(bool bStopThread /* = false */)
{
	SetState(DTSS_DISCONNECTED);

	m_CritWrite.Lock();
	while (m_lOutBuffers.pFirst)
		m_lOutBuffers.RemoveFirst();
	m_CritWrite.Unlock();

	if (bStopThread)
	{
		SetReconnect(false);
		StopThread();
	}

	return true;
}

void Datatal::DtSocketBase::WriteLog(int nImportance, const char* pszGroup, LPCTSTR lpszFormat, ...)
{
	char		szFormattedString[1124];
	va_list		argptr;

	//Initialize 
	memset(szFormattedString, 0, sizeof(szFormattedString));

	//Format Data
	va_start(argptr,lpszFormat);
	vsprintf(szFormattedString,lpszFormat,argptr);
	va_end(argptr);

	HandleWriteLog(nImportance, pszGroup, szFormattedString);
}


bool Datatal::DtSocketBase::Send(char* szBuffer, size_t nBufSize)
{

	//Lock outbuffer
	m_CritWrite.Lock();
	WriteLog(Datatal::LP_NORMAL, "Send", "Appending new buffer, size: %d", nBufSize);
	m_lOutBuffers.Append(szBuffer, nBufSize);
	m_CritWrite.Unlock();

	//Signal thread that new data exist.
	if (!SetEvent(m_hNewDataEvent))
		WriteLog(Datatal::LP_HIGH, "Send", "Set hNewDataEvent Failed!");

	return true;
}