Problems with Asynchronous Socket

#define WM_SOCKET		(WM_USER + 1)class IConnection{	public:		IConnection();		~IConnection();		bool Check_Receive_Buffer(void);		void Flush_Receive_Buffer(void);		void Send_Data(char* i_buffer, int i_buffer_length);		bool Receive_Data(void);		bool Check_For_Active_Connection();		void Close_Connection();		char m_Receive_Buffer[RECEIVE_BUFFER_SIZE];	protected:		bool Load_Winsock_Library(void);		int m_Port;		bool m_Receive_Buffer_Full;		bool m_Active_Connection;		SOCKET m_Socket;		WSADATA m_Winsock_Data;};class CServerConnection : public IConnection{	public:		CServerConnection();		~CServerConnection();		bool Begin_Listening_For_Connections(int i_port = DEFAULT_PORT);		bool Check_Listening_For_Connections(void);		void Stop_Listening_For_Connections(void);		bool Accept_Connection(void);	protected:		bool m_Listening_For_Connections;		SOCKET m_Listening_Socket;		sockaddr_in m_Server_Address;		sockaddr m_Client_Address;				int m_addr_size;};

bool CServerConnection::Begin_Listening_For_Connections(int i_port){	m_Server_Address.sin_family = AF_INET;	m_Server_Address.sin_port = htons(m_Port);	m_Server_Address.sin_addr.s_addr = htonl(INADDR_ANY);	m_Listening_Socket = socket(AF_INET, SOCK_STREAM, 0);	if(WSAAsyncSelect(m_Listening_Socket, main_window_handle, WM_SOCKET, 					(FD_READ | FD_WRITE | FD_ACCEPT | FD_CLOSE)) == SOCKET_ERROR)	{		throw Exception("Unable to set up asynchronous server socket", __FILE__, __LINE__);		return(false);	}	if (bind(m_Listening_Socket, (LPSOCKADDR)&m_Server_Address, 				sizeof(m_Server_Address)) == SOCKET_ERROR)	{	//	throw Exception("Server unable to bind socket for listening.", __FILE__, __LINE__);			WSACleanup();		m_Listening_For_Connections = false;			return(false);	}	if (listen(m_Listening_Socket, 1) == SOCKET_ERROR)	{	//	throw Exception("Server unable to begin listening.", __FILE__, __LINE__);		WSACleanup();		m_Listening_For_Connections = false;				return(false);	}	m_Listening_For_Connections = true;		return(true);}

CServerConnection* Server_Connection = NULL;LRESULT CALLBACK WindowProc(HWND hwnd, 						    UINT msg,                             WPARAM wparam,                             LPARAM lparam){	// this is the main message handler of the system	PAINTSTRUCT	ps;		   // used in WM_PAINT	HDC			hdc;	   // handle to a device context	// what is the message 	switch(msg)	{				case WM_CREATE: 			{				// do initialization stuff here				return(0);			} break;		case WM_PAINT:			{				 // start painting				 hdc = BeginPaint(hwnd,&ps);				     // end painting			     EndPaint(hwnd,&ps);			     return(0);			} break;		case WM_DESTROY: 			{				// kill the application							PostQuitMessage(0);				return(0);			} break;		case WM_SOCKET:			{				switch(WSAGETSELECTEVENT(lparam))				{					case FD_READ:						{						} break;						case FD_WRITE:						{						} break;						case FD_ACCEPT:						{							if (Server_Connection->Check_Listening_For_Connections())							{								if (!Server_Connection->Check_For_Active_Connection())								{									Server_Connection->Accept_Connection();									Server_Connection->Stop_Listening_For_Connections();									Server_Connection->Flush_Receive_Buffer();																				}							}						} break;						case FD_CONNECT:						{						} break;						case FD_CLOSE:						{						         Server_Connection->Close_Connection();							} break;				}			} break;		case WM_ACTIVATE:			{} break;	default:break;    } // end switch	// process any messages that we didn't take care of 	return (DefWindowProc(hwnd, msg, wparam, lparam));} // end WinProc

LRESULT CALLBACK TestWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);// Mainint WINAPI WinMain(	HINSTANCE hInstance,	HINSTANCE hPrevInstance,	LPSTR lpCmdLine,	int nCmdShow) {	WNDCLASS	wc;	HWND		hWnd;	SOCKET		s;	SOCKADDR_IN	addr;	MSG			msg;	WSADATA		wsaData;	int			iret;		// WinSock	iret = WSAStartup(0x202, &wsaData);	if(iret || wsaData.wVersion != 0x202) {		return 0;	}		// Wndclass	memset(&wc, 0, sizeof(wc));	wc.lpszClassName = "TestClass";	wc.hInstance = hInstance;	wc.lpfnWndProc = TestWndProc;	wc.hCursor = LoadCursor(NULL, IDC_ARROW);	wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);	if(RegisterClass(&wc) == 0) {		WSACleanup();		return 0;	}		// Window	hWnd = CreateWindow(		"TestClass",		"TestWindow",		WS_OVERLAPPEDWINDOW,		CW_USEDEFAULT,		CW_USEDEFAULT,		400,		300,		NULL,		NULL,		hInstance,		NULL	);	if(hWnd == NULL) {		WSACleanup();		return 0;	}	ShowWindow(hWnd, nCmdShow);		// Socket	s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);	if(s == INVALID_SOCKET) {		WSACleanup();		return 0;	}		// Async	if(WSAAsyncSelect(s, hWnd, WM_USER+1, FD_ACCEPT) != 0) {		WSACleanup();		return 0;	}		// Bind	memset(&addr, 0, sizeof(addr));	addr.sin_family = AF_INET;	addr.sin_addr.s_addr = INADDR_ANY;	addr.sin_port = htons(8888);// Port	if(bind(s, (LPSOCKADDR)&addr, sizeof(addr)) == SOCKET_ERROR) {		WSACleanup();		return 0;	}		// Listen	if(listen(s, SOMAXCONN) == SOCKET_ERROR) {		WSACleanup();		return 0;	}		// Loop	while(GetMessage(&msg, NULL, 0, 0)) {		TranslateMessage(&msg);		DispatchMessage(&msg);	}		// Close listening socket	closesocket(s);		// Close WinSock	WSACleanup();		return msg.wParam;}// WinMain// WndprocLRESULT CALLBACK TestWndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam) {	switch(msg) {		// Socket message		case WM_USER+1:			switch(WSAGETSELECTEVENT(lParam)) {				// Incoming connection				case FD_ACCEPT:					if(WSAGETSELECTERROR(lParam)) {						// Error					}					else {						// Connection available						SOCKET	ls = (SOCKET)wParam;						SOCKET	s;												// Accept it						s = accept(ls, NULL, 0);						if(s == INVALID_SOCKET) {							// Failure						}						else {							// Success							MessageBox(NULL, "CONNECTION ACCEPTED", "MESSAGE", MB_OK);														// Close the accepted connection after the user closes							// the message box							closesocket(s);						}					}				break;			}		break;				// Close		case WM_CLOSE:			PostQuitMessage(0);		break;	}		return DefWindowProc(hWnd, msg, wParam, lParam);}// TestWndProc