#include <gtk/gtk.h>   int main( int argc,          char *argv[] ){    GtkWidget *window;    GtkWidget *aspect_frame;    GtkWidget *drawing_area;    gtk_init (&argc, &argv);       window = gtk_window_new (GTK_WINDOW_TOPLEVEL);    gtk_window_set_title (GTK_WINDOW (window), "Aspect Frame");    g_signal_connect (G_OBJECT (window), "destroy",	              G_CALLBACK (gtk_main_quit), NULL);    gtk_container_set_border_width (GTK_CONTAINER (window), 10);       /* Create an aspect_frame and add it to our toplevel window */       aspect_frame = gtk_aspect_frame_new ("2x1", /* label */                                         0.5, /* center x */                                         0.5, /* center y */                                         2, /* xsize/ysize = 2 */                                         FALSE /* ignore child's aspect */);       gtk_container_add (GTK_CONTAINER (window), aspect_frame);    gtk_widget_show (aspect_frame);       /* Now add a child widget to the aspect frame */       drawing_area = gtk_drawing_area_new ();       /* Ask for a 200x200 window, but the AspectFrame will give us a 200x100     * window since we are forcing a 2x1 aspect ratio */    gtk_widget_set_size_request (drawing_area, 200, 200);    gtk_container_add (GTK_CONTAINER (aspect_frame), drawing_area);    gtk_widget_show (drawing_area);       gtk_widget_show (window);    gtk_main ();    return 0;}