dialog_message - Sends a message to all the objects in an array.
Allegro game programming library.
#include <allegro.h>
int dialog_message(DIALOG *dialog, int msg, int c, int *obj);
Sends a message to all the objects in an array. If any of the dialog
procedures return values other than D_O_K, it returns the value and
sets obj to the index of the object which produced it.
object_message(3alleg), broadcast_dialog_message(3alleg)