Please learn first about the differences between the network communication and the user interface your program is using.

In principle, it is possible to inject automated commands into every stream, where it is easier in many cases to inject commands into your user interface (through X11::GUITest or Win32::GUITest).

Completely decoding a foreign network protocol is not easy, and you will be even more dependant on changes within the client protocol. Net::PCapUtils is my tool of choice for network sniffing of local programs, and I believe that it is also possible to alter packets and inject new packets into the stream.

None of the two ways are easy, and if you don't even know the difference, you have much to learn on your way. I suggest that you start by automating the UI via one of the GUITest modules, as the interface is more accessible and visible to you.

perl -MHTTP::Daemon -MHTTP::Response -MLWP::Simple -e ' ;    # The  
$d = new HTTP::Daemon and fork and getprint $d->url and exit;#spider
($c = $d->accept())->get_request(); $c->send_response( new   #in the
HTTP::Response(200,$_,$_,qq(Just another Perl hacker\n))); ' #  web
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