Sniffer Problem

Hi folks, I downloaded a simple ip sniffer here from c# corner and after fixing the bugs that were in it, it works quite nice with one problem: (of course) i can see only the ip packets ARRIVING on my machine... but what I really need is to see the packet that are SENT from my machine. I am debugging an asynchronous IP application here (with several sender/receiver threads in beackground) and the best way to find out the issues in the communication is by sniffing imho. So simple question: anyone has code how to capture OUTGOING packets? SIO_RCVALL allows the viewing of received only. Any help appreciated, thanks, Mike