thread termination in vc++ mfc

[sacredtara]

i want to terminate some specified threads? all i want to do is this: i am creating threads for clients connect to servers by createthread function; i call this function in my onclickconnect() button call, for each selected server in the listbox, i create a thread and do the operations; startconnection, receive message from server etc. I pass the connected ip-ports in some other list and I want to have a disconnect button. when i select ip-ports in the "successful connections" list and click on the button, i want the corresponding threads to terminate. I have done some coding and this works fine for several steps. When I try to connect the server, it connects. When I try to disconnect from the server the thread is terminated. HOWEVER when I try to connect to the disconnected server it gives an error and my program terminates. I dont want such things. If you can examine my code and give me some advice, I will be grateful. Thanks
Here is my connect/disconnect button:

if(m_con1dis2 == 1) //connect 
	{
		m_fails.ResetContent();
		m_success.ResetContent();
		Selected = 0; //number of the servers selected from the list
	
		for(int i=0; i< m_ctlServerList.GetCount();i++)
		{
			if(m_ctlServerList.GetCheck(i) == 1 ) 
			{
				Selected++; 
			}
		}
		//no line is selected:
		if(Selected == 0) 
			AfxMessageBox(L"No Server is Selected!");

	    
		CString *diziPtr= new CString[Selected]; 
		CString *ptr= new CString[Selected]; 
		char str[2];
		CString svar;
		for(int i=0; i< m_ctlServerList.GetCount();i++)
		{
			if(m_ctlServerList.GetCheck(i) == 1 ) 
			{
				_itoa_s(i,str,10);
				svar = str;
				*diziPtr = lines[i]+_T(":")+svar+_T("-")+m_savepath;
				++diziPtr;	
			}
		}
		for(int i=0;i<Selected;i++)
		{  
			--diziPtr; 	
			Client_Thread[Selected-i-1]=CreateThread(NULL,0,ClientThread,(void *)diziPtr,0,&Client_ThreadID);	
		} 

		while(done==true)
		{
		}
	

		for(int i=0; i< m_ctlServerList.GetCount();i++)
		{
			if(m_ctlServerList.GetCheck(i) == 1 ) 
			{
				_itoa_s(i,str,10);
				svar = str;
				*ptr = lines[i]+_T(":")+svar;
								
				if(connected[i] == 2)
				{
					m_success.AddString(*ptr);
				
				}
				else if(connected[i] == 1)
				{
					m_fails.AddString(*ptr);
				
				}
				++ptr;	
				UpdateData(false);	
			}
		}
		thread = 0;
		done = true;
	
	}//end of connect button

if(m_con1dis2 == 2) //disconnect 
	{
		CString strTxt,thnum;
		int tnum;
		toDisconnect = 0;
		for(int i=0; i< m_success.GetCount(); i++)
		{
			if(m_success.GetSel(i) == 1) 
			{
				toDisconnect++;
				m_success.GetText(i,strTxt);
				MessageBox(strTxt);
				AfxExtractSubString(thnum, strTxt, 2, ':');//third substr after : is the threadno
			    tnum = _wtoi(thnum); //CString to int
				TerminateThread(Client_Thread[tnum],0);
				CloseHandle(Client_Thread[tnum]);
				AfxMessageBox(L"You terminated thread!");
				//system("PAUSE");
				//exit(8);
				
			}
		}
		for(int i=0; i< m_success.GetCount(); i++) //disconnect 
		{
			if(m_success.GetSel(i) == 1) 
			{
				m_success.DeleteString(i);
				m_fails.AddString(strTxt);
			}
		}
		

		UpdateData(false);
		if(m_success.GetCount() == 0)
		{	m_ctlConnect.SetWindowTextW(_T("Connect"));
			m_con1dis2 = 1;
		}


	}//end of disconnect button
}

here is my clientthread function:

DWORD WINAPI ClientThread(void * num)
{   
	
	/*signal( SIGINT, &signal_handler );
    signal( SIGTERM,&signal_handler );  
    signal( SIGABRT,&signal_handler );  */

	CString ipport= *(CString * ) num;	
    CString ipAddress,savepath;
	CString ports,socknums;
	int port,socknum;
   	
	AfxExtractSubString(ipAddress, ipport, 0, ':'); //first substr upto : is the ip
	AfxExtractSubString(ports, ipport, 1, ':');//second substr after : is the port

    port = _wtoi(ports);//CString to int

	AfxExtractSubString(socknums, ipport, 2, ':');//third substr after : is the threadno

	AfxExtractSubString(savepath, ipport, 1, '-');//second substr after - is the savepath

    socknum = _wtoi(socknums); //CString to int
	CStringA ip(ipAddress); //CString to const char *
    Socket sockClient(socknum);

	if(sockClient.ConnectToServer(ip, port,socknum)== 0) //connection failed
	{	connected[socknum] = 1;
		thread++ ; 
		
	}
	else
	{
		connected[socknum] = 2;
		thread++ ; 
		sockClient.timefile(ipAddress,ports,savepath);//creating the ip_port.txt file and write the time in it
		sockClient.RecvData(ipAddress,ports,socknum,savepath);	
						
	}
	if(thread == Selected) //Selected and thread are global int
		{
			done = false;
		}
		
	return 0;
   
}

[salquestfl]

I suspect the reconnection is unsuccessful because you are not properly closing the connection. Instead of terminating the client threads abruptly, you should do that.