message_begin(MSG_ONE , get_user_msgid("TextMsg") , {0,0,0} , id);
write_byte(id??); // What should I put for the ID?
write_string("#Cant_buy");
message_end();  

id =  to one of these
#define HUD_PRINTNOTIFY        1
#define HUD_PRINTCONSOLE    2
#define HUD_PRINTTALK        3
#define HUD_PRINTCENTER        4