class ChatWindow 
{
   struct connectEntryStruct
       {
          GtkEntry *ipEntry;
	  GtkEntry *portEntry;
       };	
   public:
    .
    .  
      void connect(GtkWidget *widget, gpointer connectEntry);
      static void staticWrapperConnect(void *ptfncHello, GtkWidget *widget, gpointer connectEntry);
.
.
}

GtkWidget * ChatWindow::connectLayOut(GtkWidget * window)
{
       .
       .
      .       
       GtkWidget *ipEntry = gtk_entry_new();
         
       GtkWidget *portEntry = gtk_entry_new();
   .
   .    
       connectEntryStruct * connectEntry = new connectEntryStruct;
       connectEntry->ipEntry = GTK_ENTRY(ipEntry);
       connectEntry->portEntry = GTK_ENTRY(portEntry);
    .    
       g_signal_connect (G_OBJECT (connectButton), "clicked",
                      G_CALLBACK (staticWrapperConnect), connectEntry);
 }

   
void ChatWindow::connect( GtkWidget *widget, gpointer connectData)
{
    
    connectEntryStruct * connectEntry = reinterpret_cast<connectEntryStruct*>(connectData);
    const gchar * ipAdress = gtk_entry_get_text(connectEntry->ipEntry);
    const gchar * portNumber = gtk_entry_get_text(connectEntry->portEntry);
    
    g_print ("ipAdress\n");
    g_print ("portAdress\n");
}

void ChatWindow::staticWrapperConnect(void *ptfncHello, GtkWidget *widget, gpointer connectEntry)
{
   ChatWindow *chatHello = (ChatWindow*) ptfncHello;  //cast to member function
   chatHello->connect(widget, connectEntry);
}