gtk_dialog.cxx

// g++ $(pkg-config gtk+-2.0 --libs --cflags) gtk_dialog.cxx

#include <cstdlib>
#include <string>

#include <gtk/gtk.h>
#include <glib.h>


void ShowMessageBox(GtkMessageType type, std::string const& title, std::string const& message)
{
	GtkWidget* dialog = gtk_message_dialog_new(
		(GtkWindow*)NULL, GTK_DIALOG_MODAL, type, GTK_BUTTONS_OK, message.c_str() );
	gtk_window_set_title( (GtkWindow*)dialog, title.c_str() );
	gtk_widget_show_all(dialog);
	(void)gtk_dialog_run( GTK_DIALOG(dialog) );
	gtk_widget_destroy(dialog);
}

int main(int argc, char* argv[])
{
	gtk_init(&argc, &argv);

	ShowMessageBox(GTK_MESSAGE_QUESTION, "Hello!", "Hello World!");
	ShowMessageBox(GTK_MESSAGE_WARNING, "Hello!", "Hello World!");
	ShowMessageBox(GTK_MESSAGE_ERROR, "Hello!", "Hello World!");

	return EXIT_SUCCESS;
}