#include <windows.h>
#include <iostream>
#include <winsock.h>
#include <sys/types.h>

#pragma comment( lib, "Ws2_32.lib" )

using namespace std;

int main( int arg, char* arvg[ ] )
{
    WSADATA wsaData;
    SOCKET RecvSocket;
	SOCKET connectedSocket;

	int BufLen = 1024;
	char RecvBuf[ 1024 ];
	char SendBuffer[ 1024 ];

	WSAStartup( MAKEWORD( 2, 0 ), &wsaData );

    sockaddr_in RecvAddr;
	//sockaddr_in clientService;
	unsigned short Port = 2011;

	RecvSocket = socket( AF_INET, SOCK_DGRAM, IPPROTO_IP );
	if( RecvSocket == INVALID_SOCKET )
	{
		cout << "Socket failed! Error Code: " << WSAGetLastError( ) << endl;
	}

	memset( &RecvAddr, 0, sizeof( SOCKADDR_IN ) );
	RecvAddr.sin_family = AF_INET;
    RecvAddr.sin_port = htons( Port );
	RecvAddr.sin_addr.s_addr = inet_addr( "127.0.0.1" );

	if ( connect( RecvSocket, ( SOCKADDR* )&RecvAddr, sizeof( RecvAddr ) ) == -1 )
	{
		cout << "Connection failed! Error Code: " << WSAGetLastError( ) << endl;
	}

	if ( bind( RecvSocket, ( SOCKADDR* )&RecvAddr, sizeof( RecvAddr ) ) == SOCKET_ERROR )
	{
		cout << "Bind failed! Error Code: " << WSAGetLastError( ) << endl;
	}

	if ( listen( RecvSocket, 10 ) == SOCKET_ERROR )
	{
		cout << "Listen failed! Error Code: " << WSAGetLastError( ) << endl;
	}

	connectedSocket = accept( RecvSocket, NULL, NULL );

	if ( connectedSocket == INVALID_SOCKET )
	{
		cout << "Accept failed! Error Code: " << WSAGetLastError( ) << endl;
	}

	strcpy( SendBuffer, "Test" );

	/*while( TRUE )
	{
		recvfrom( RecvSocket, RecvBuf, BufLen, NULL, ( SOCKADDR* )&RecvAddr, ( int * )&RecvAddr );
		cout << "Shit bekommen: " << RecvBuf << endl;
		for ( int i = 0; i < 16; i++ )
		{
			cout << RecvBuf[ i ];
		}
		cout << endl;
		//int res = sendto( RecvSocket, SendBuffer, BufLen, NULL, ( SOCKADDR* )& RecvAddr, sizeof( RecvAddr ) );
	}*/

    closesocket( RecvSocket );

    WSACleanup( );
	return NULL;
}

MfG BlauBär

#define WIN32_LEAN_AND_MEAN

Es verhindert Konflikte zwischen der ersten und zweiten Version von WinSock.