diff -urN cui18/cui.c cui19/cui.c
--- cui18/cui.c	Thu Jan 30 22:20:00 2014
+++ cui19/cui.c	Thu Jan 30 22:30:00 2014
@@ -45,6 +45,14 @@
 	obj->children = child;
 }
 
+cui
+cui_base_new(cui parent, int x, int y, int w, int h)
+{
+	cui obj = cui_alloc(sizeof(struct cui_base));
+	cui_base_init(obj, parent, x, y, w, h);
+	return obj;
+}
+
 void
 cui_draw_str(cui obj, int x, int y, char *s, int attr)
 {
diff -urN cui18/cui.h cui19/cui.h
--- cui18/cui.h	Thu Jan 30 22:20:00 2014
+++ cui19/cui.h	Thu Jan 30 22:30:00 2014
@@ -32,6 +32,7 @@
 cui cui_alloc(int size);
 void cui_base_init(cui obj, cui parent, int x, int y, int w, int h);
 void cui_base_child_add(cui obj, cui child);
+cui cui_base_new(cui parent, int x, int y, int w, int h);
 
 void cui_draw_str(cui obj, int x, int y, char *s, int attr);
 void cui_fill_rect(cui obj, int x, int y, int w, int h, char c, int attr);
diff -urN cui18/cui_test.c cui19/cui_test.c
--- cui18/cui_test.c	Thu Jan 30 22:10:00 2014
+++ cui19/cui_test.c	Thu Jan 30 22:30:00 2014
@@ -17,14 +17,30 @@
 }
 
 int
+my_hdr2(cui obj, int evt, int val, void *prm)
+{
+	cui dlg = (cui)prm;
+	if(cui_is_visible(dlg)) cui_hide(dlg);
+	else cui_show(dlg);
+	cui_button_str_set(obj, cui_is_visible(dlg) ? "Hide Dialog" : "Show Dialog");
+	return TRUE;
+}
+
+int
 main()
 {
-	cui obj = cui_simple_dialog_new(NULL, 2, 2, "Are you sure ?", "OK", "Cancel");
-	cui_simple_dialog p = (cui_simple_dialog)obj;
+	cui base = cui_base_new(NULL, 0, 0, 40, 20);
+	cui btn = cui_button_new(base, 2, 1, "Show Dialog");
+	cui dlg = cui_simple_dialog_new(base, 2, 2, "Are you sure ?", "OK", "Cancel");
+	cui_simple_dialog p = (cui_simple_dialog)dlg;
+
+	dlg->flags |= CUI_FLG_HIDE;
+	cui_bind(btn, CUI_EVT_BUTTON, my_hdr2, p);
 	cui_bind(p->btn1, CUI_EVT_BUTTON, my_hdr, p);
-	cui_main(obj);
+
+	cui_main(base);
 	printf("result %s\n", p->btn_result);
-	cui_free(obj);
+	cui_free(base);
 	return 0;
 }