Program craches, why?

[jalkadir gosonic ca]

I tried to provide as little code as possible, but to make what my
intentions are clearer I had to add quite a bit, please bear with me?

This program runs, but when click on any button, with the exception of the
?Exit? button, I get a segmentation fault error. I really don?t know why,
but what I want to do is display a message-box with some data when the
user presses any of the buttons, aside from the ?Exit? button.

Can anyone help?


TIA

-- messae.hpp --
#include <string>
#include <iostream>
#include <gtk/gtk.h>
#ifndef GTK_MESSAGE_HPP
#define GTK_MESSAGE_HPP
typedef struct{
      gchar* str;
      GtkWidget* obj;
   }DATA;
void GeneralMsg(GtkButton* button, gpointer d);

#endif
-- end of file --

-- message.cpp --
#ifndef GTK_MESSAGE_HPP
#include "Message.hpp"
#endif
void GeneralMsg(GtkButton* button, gpointer p) {
    DATA* d;
    reinterpret_cast<DATA*>(p);
	GtkWidget* label;
	GtkWidget* dialog;
	try {
		dialog = new GtkWidget;
		label = new GtkWidget;
		d = new DATA;
		} catch(std::bad_alloc& e) {
		std::cout << e.what() << std::endl;
		}

	dialog = gtk_message_dialog_new(
                 reinterpret_cast<GtkWindow*>(d->obj),  //Parent
                 static_cast<GtkDialogFlags>(
                                GTK_DIALOG_MODAL |
                                GTK_DIALOG_DESTROY_WITH_PARENT),//Flags
	         reinterpret_cast<GtkMessageType>(
                                GTK_MESSAGE_WARNING), // Message type
	         reinterpret_cast<GtkButtonsType>(
                                GTK_BUTTONS_OK),      //Button type
	         d->str);                              //Message format

// Destroy the dialog when the user responds to it (e.g. clicks a button)
	gtk_dialog_run (GTK_DIALOG (dialog));
	gtk_widget_destroy (dialog);
        delete d;
	delete dialog;
	delete label;
}

-- eof --

--- main.hpp ---
//Declare the objects
   GtkWidget* MainMenueWin;
   GtkWidget* btnCreateAccount;
   .....

   DATA* data;

   void Quit(GtkButton* , gpointer);
   gboolean SystemQuit(GtkWidget*, GdkEvent*, gpointer);

//Callbacks
void Quit(GtkButton* was_clicked, gpointer user_data){
   gtk_main_quit();
}
gboolean SystemQuit(GtkWidget* widget, GdkEvent* event, gpointer user_data){
     gtk_widget_destroy(widget);
     gtk_main_quit();
     return(TRUE);
}
#endif
-- end of main.hpp --


--- main.cpp ---
#include <gtk/gtk.h>
#include <glib-object.h>
#include <string>
#include <iostream>

#ifndef GTK_MESSAGE_HPP
   #include "Message.hpp"
#endif
#include "main.hpp"

int main(int argc, char *argv[]){
   try{data = new DATA;}
   catch(std::bad_alloc& e){std::cout << e.what() << std::endl;}
   //Assign data to the object passased to the callback function
   data->str = g_strdup("Under Comstruction ... I am very sorry, but this \
                    feature has not been implemented yet. Please check \
                    my email me for any new updates on this program \
                    El-Mago hotmail com");
   data->obj = MainMenueWin;

   // 1. Initialize the environment
   gtk_set_locale ();
   gtk_init(&argc, &argv);
   //-liconv -liconv
   // 2. Create Widgets
   MainMenueWin = gtk_window_new(GTK_WINDOW_TOPLEVEL);
   VBx = gtk_vbox_new(FALSE,10);
   Label = gtk_label_new("Jaime");
   Separator = gtk_hseparator_new();
   btnCreateAccount = gtk_button_new_with_label("Create");
   ...
   btn5 = gtk_button_new_with_label("Unknown");
   btnExit = gtk_button_new_with_label("Exit");

   // 3. Set attributs
   gtk_window_set_title(GTK_WINDOW(MainMenueWin), "Jaime");
   gtk_window_set_policy(GTK_WINDOW(MainMenueWin), //which_window
                         FALSE,                    // allow_shrink
                         FALSE,                    // allow_grow
                         FALSE);                   // auto_shrink

   gtk_container_set_border_width(GTK_CONTAINER(MainMenueWin),15);
   gtk_widget_set_name(MainMenueWin,"Gtk++ One, Dos, Tres");
   gtk_widget_set_name(VBx,"vertical box");
   gtk_widget_set_name(Label,"Label");
   gtk_widget_set_name(Separator, "Separator");

   // 4. Register CallBacks
   // These three callback fun' are only to exit the application
   g_signal_connect( GTK_OBJECT(btnExit), "clicked",
                     G_CALLBACK(Quit),    NULL);
   g_signal_connect( GTK_OBJECT(MainMenueWin), "delete-event",
                     GTK_SIGNAL_FUNC(SystemQuit), NULL);
   g_signal_connect(GTK_OBJECT(MainMenueWin), "destroy",
                    G_CALLBACK(SystemQuit), NULL);


   g_signal_connect(GTK_OBJECT(btnCreateAccount),
                    "clicked",
                    G_CALLBACK(GeneralMsg),
                    reinterpret_cast<gpointer>(&data));


   return 0;
}