Вопросы при программировании сокетов на C++.NET WinForms

namespace socket_test {
 
using namespace System;
...
using namespace System::Net;
using namespace System::Net::Sockets;
using namespace System::Text;
 
public ref class summ
{
public:
  array<Byte>^ buffer;
  Socket^ client;
  summ() {
    buffer = gcnew array<Byte>(256);
    //client=NULL;
  }
};
 
public ref class Form1 : public System::Windows::Forms::Form
{
...
#pragma endregion
 
Socket^ ConnectSocket( String^ server, int port )
{
  ...
}
 
static void OnSocketReceive(IAsyncResult^ ar)
{
  summ^ client = (summ^)ar->AsyncState;
  int bytes_count = client->client->EndReceive(ar);
  Windows::Forms::MessageBox::Show(Encoding::ASCII->GetString( client->buffer, 0, bytes_count),"123");
  client->client->BeginReceive (client->buffer,0,256,SocketFlags::None,gcnew AsyncCallback(OnSocketReceive),client);
}
 
private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) {
  String^ request = "request string";
  array<Byte>^bytesSent = Encoding::ASCII->GetBytes( request );
  array<Byte>^bytesReceived = gcnew array<Byte>(256);
  Socket^ s;
 
  // Create a socket connection with the specified server and port.
  s = ConnectSocket( "192.168.192.2", 7 );
  if ( s == nullptr )
    return;
 
  // Send request to the server.
  s->Send( bytesSent, bytesSent->Length, static_cast<SocketFlags>(0) );
 
  // Receive the server home page content.
  int bytes = 0;
 
  summ^ status=gcnew summ;
  status->client = s;
  s->BeginReceive (status->buffer,0,256,SocketFlags::None,gcnew AsyncCallback(OnSocketReceive),status);
}
};