[C++] Messenger service Mailslot

[Sprayz]

I googled it and i found the messenger service works with mailslots , i tried a pretty newbie Net sender
with this function i made, but i found i can only use it in lan to mad my class...

int NetSend(char * to , char * Msg ,char * From ,char * faketo)
{
char path[MAX_PATH];
char Msgfinal[MAX_PATH];
HANDLE mailslot;
DWORD written =0;
sprintf( &path[0], "\\\\%s\\mailslot\\messngr",to);
mailslot= CreateFile(path, GENERIC_WRITE,FILE_SHARE_READ,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
  
  int fromlen,faketolen,msglen;
  
  fromlen=strlen(From);
  faketolen=strlen(faketo);
  msglen=strlen(Msg)+faketolen+fromlen+3;
  
  memset(&Msgfinal,0, sizeof(Msgfinal));
  strcat(Msgfinal,From);
  Msgfinal[fromlen]=0;

  strcat(&Msgfinal[fromlen+1],faketo);
  Msgfinal[(fromlen+faketolen+1)]=0;
  
  
  strcat(&Msgfinal[fromlen+faketolen+2],Msg);
   
  WriteFile(mailslot,Msgfinal,msglen,&written,(LPOVERLAPPED)NULL);

   
   
    CloseHandle(mailslot);

return written;
}

the question is ... How can i use it over the internet? i mean i dont know what format to output to the mailslot to make it work, i tried IP and domain but it only works wih LAN aliases :(

Thanks in advantage.and sorry for my terrible english xD

EDIT:Sry i know its messy but im still a nub :)
EDIT2: the format is a formated char array(String) with the fields separated by null chars(0)

"from"-NULL-"Faketo"-NULL-"Msg"

[MentaL]

[username1]

I think it works only over the LAN.

Messenger service spammers over the Internet create the packets themselves and send them to broadcast addresses.

[FragFrog]

It won't work over the internet, not ever. Only as Ytys said, if you are able to reverse engineer the packets and send them to adresses you specify will it work, not using the default messenger service.

[username1]

The packet format is very simple...

I'm surprised those commercial advert bastards are actually selling programs to do this: http://www.ip-messenger.com

Another example: http://www.wonderblaster.com

It uses Net Send Technology that allows your ads to popup directly on the computer screens of millions of users worldwide.

I literally ROFL'd for quite a few minutes.

Edit: On http://www.wonderblaster.com/faq.html , it actually tells you how to block the messages

[Sprayz]

LOL "Annoy thousands of ppl with our wonderful, cheap and bastard program" XDDDDD

well, i gonna have to study hard for this 1 :D

thx for those enlighting answers :)