Can anyone help me with creating a basic popup menu with 2-3 buttons that can be exec from the main menu?

menuDef
   {
       CENTER_POPUP_SETUP( popup_classlimit, 4, 1, 1 )

       CHOICE_POPMENU_TITLE( "Class limit has been reached." )
       CHOICE_BUTTON( 2, "ddddd", close self; )
       CHOICE_BUTTON( 3, "dddd", close self; )
       CHOICE_BUTTON( 4, "OK", close self; )

   }