New to ncurses

[Canul D]

Why dosn't this code snipet display anything?
#include <curses.h>
void main(void)
{
   WINDOW *my;
   initscr();
   cbreak();
   my = newwin(12, 12, 12, 12);
   waddstr(my, "I can't understand why it dosn't want to work!\n");
   refresh();
   endwin();
}