пример кода 
//FILE - CNet.cpp

#include "CNet.h"

 CNet::CNet()
 {
	 WSADATA wd;

	 memset( &wd, 0, sizeof(wd) );

	 if( SUCCEEDED( WSAStartup(MAKEWORD(2,2), &wd )) ) 
	 {
		 m_bBadSocket        = false;
		 m_bBadAuthorization = false;
		 m_iLenMsg           = 0;
	 }

	 if( !m_bBadSocket )
		 StartingServer();
	 else 
		 WSACleanup();
 }

 void CNet::AbortServer()
 {
	 /*Message*/
	 closesocket(m_sListen);
	 WSACleanup();
 }

 void CNet::StartingServer()
 {
	 sockaddr_in SockServer;

	 memset( &SockServer, 0, sizeof(sockaddr_in) );

	 SockServer.sin_family      = AF_INET;
	 SockServer.sin_port        = htons(FTP_PORT);
	 SockServer.sin_addr.s_addr = htonl(INADDR_ANY);

	 m_sListen = socket( AF_INET, 
		                 SOCK_STREAM, IPPROTO_TCP );

	 if( FAILED( m_sListen ) ) 
		 m_bBadSocket = true;

	 if( FAILED( bind( m_sListen, reinterpret_cast<sockaddr*>(&SockServer), sizeof(sockaddr_in))) )
		 m_bBadSocket = true;

	 if( FAILED( listen( m_sListen , 1 )) )
		 m_bBadSocket = true;

	 if( m_bBadSocket )
		 AbortServer();	 

		for( ;; ) {
			m_sLink = accept( m_sListen, NULL, NULL );

			
		}
		
	 shutdown( m_sListen, 2 );
	 closesocket( m_sListen );
	 WSACleanup();
 }
 

//FILE - CNet.h

#include <WinSock.h>
#include "CEncode.h"

	using namespace std;

#pragma comment(lib,"ws2_32.lib")


#define USER_DEFAULT_LOGIN		"gera"
#define USER_DEFAULT_PASSWORD   "gera"

#define REQUEST_AUTHORIZATION   "PE_AUTO"                  /* Запрос на авторизацию  */
#define REQUEST_SUCCESS			"YS_AUTO"                  /* Авторизация успешна    */
#define REQUEST_FAILED          "YF_AUTO"				   /* Авторизация неуспешна  */
#define REQUEST_AUTH_ERROR      "FQ_USER"                  /* Отказано в доступе     */

#define HELLO_TRAVELING			"HI TRAVELING\n"	       /* Строка приветствия     */

#define FTP_PORT                21

class CNet : public CEncode
{

	SOCKET m_sLink;
	SOCKET m_sListen;

	bool   m_bBadSocket;
	bool   m_bBadAuthorization;

	int    m_iLenMsg;

	void StartingServer();
	void AbortServer();

	public:
		CNet();
};