...
 $w = CreateWindow(...);    # full screen window
 DrawBackgroundPicture($w,'file.jpg');
 $p = CreateProgressBar($w, \&timer);
 RenderAndPrint("Waiting for a new Ip address", 'verdana'); 
 $p -> Start();
 $_ = `dhclient -e eth0 2>&1`;
 ($ip) = /bound to (\d+\.\d+\.\d+\.\d+)/;
 $p -> Stop ();
 unless ( $? ) {
     NextScreen(...); #we must introduce manual config  
 } else {
     MsgBox("Configured correctly ...");
 }
 NextScreen(...); #Next Task ...
 ...